I've had, tested, benchmarked all kinds of CPUs within different price ranges. Before the G3258 Intel CPU, for low end builds, you'd be absolutely foolish to buy intel.

You can pretty much sumarize the CPU performance below:

Sub 100 bucks - AMD > Intel

- other than if you get G3258 and overclock, Athlon X4 and FX 4300 wll beat all Intels sub 100 dollar chips in gaming and other benchmarks

- Only reason to get Intel is because of single threaded performance 

Sub 150 bucks - AMD > Intel

- FX 6300/6350 and 8320 will beat intel i3s in 95% of the games and most other performance benhcmarks

- Only reason to get Intel is because of single threaded performance 

- Once you overclock AMD chips, its not even close

200 bucks and above - Intel > AMD

- No contest really once you get Intels i5

You have summed it up perfectly disolitude.

This silly Intel vs AMD thing needs to stop, instead buy the best performance for your dollar.

And don't get a Geforce 750Ti.
You will be wasting money for what is essentially a side-grade. (20-40% performance difference, less if you overclock that 6850.)
If you intend to upgrade the GPU, upgrade it to something actually worthwhile.

Conversely, if you were to stick with an AMD GPU, you will be able to take advantage of Mantle-enabled games, which (Like Beyond Earth) can drastically change the experience.
And even though AMD's high-end GPU's almost need a Nuclear Reactor and creates heat-waves to function, they're cheap, powerful, again, what you SHOULD be focused on when doing a budget build.

Well you are right if you considered "Overclocking " but i sugest the specification for PC beginer (eventhou overclocking is easy) but still it's wise if the hardware stay as it is.

and the price yes i agree, thats why it's better to hold until he get the money more and it's just slightly expensive but better in overal. It's just my preference , AMD price is good but for longevity reliabilty, power consumption (you need more good PSU ), heat, and other 's thing, Intel is more better (my opinion back up by many people here).

so my preference AMD is good, the performence " sometimes " exceeding intel, and the price is cheeper on the same class,   if you looking for a short term, but when you look into Intels is more expensive but the benefit is not just on performance but overal from maintenance, power consumption and etc.

Well i never had AMD seriously, but i read in forums and ask my friend who had experience and all my relative on PC store and including read on review, so i don't have to spend a lot of money to benchmarking all those card and i trust your judgement but i also trust my own judgement

Well like what i said, it's useless to have powerfull GPU if there is'nt any good games to use for "only few games that utilizing mentel for now ", from driver stability, game which suporting it, heat, and power consumption again AMD lack for this.

I am saying this based on my opinion (well off course i am not alone for this one), but in the end money is not just the preference we have to know what type of consumere OP is, did he like to overclock the CPU, did he like to have bigger casing, what type of games and company he like to playing thou (some company and games better on Ati and some are better on GForce.

R9 290 is the best price/perf right now, but otherwise I don't know the prices of cards in your country.

Yeah ive seen 280x aka 7970 ghz for ass low as $219...thats just absurd pricing. 290 for 299 is also tempting but thst gpu needs some hardcore cooling and a thermonuclear power supply. Doubt someone running a rig like this one could run it without upgrades.

Drivers for AMD are fine.

Are you fogetting that nVidia was responsible for almost 30% of Blue-screens of death in Windows Vista?
http://gizmodo.com/373076/nvidia-responsible-for-nearly-30-of-vista-crashes-in-2007

nVidia sometimes has driver releases which are buggy which ranges from system crashes to graphics corruption to performance irragularities and sometimes it has fantastic drivers where everything is rock-solid smooth and brings with it substantual features and performance benefits.

AMD is the exact same, if AMD truly did have debilitating drivers in comparison to nVidia, Then I would be one of the first to know, I run triple monitors in eyefinity and four Radeon R9 290's in Crossfire, which isn't a "Simple" set-up with more aspects that could potentially go wrong.

As for Mantle... Every Frostbite powered game will support it going forward.
That's a pretty big chunk of EA's entire game library... From Plant's VS Zombies to Battlefield 4, Battlefield: Hardline, Dragon Age: 3, Mass Effect 4? You name it.
Then we have Civilization: Beyond Earth, Star Citizen, Thief, StarWars: Battlefront, Need for Speed, Sniper Elite 3.

CryEngine, Unreal, Frostbite 3 support Mantle.

Again, it all depends on what games he ultimatly decides he wishes to play as nVidia has it's own lock-in's like PhysX and G-Sync which may be better for him depending on the titles he is drawn towards.

The Op really hasn't provided enough details about budgets etc' to really make an informed decision on his upgrade path either way.

Thanks everybody for your answers!
Made some testing yesterday. It seems that
Diablo 3 is eating GPU to 100% on highest/1080p, and CPUs are on 70-80%, all in 50-60 fps.
War Thunder on very high on 1080p is 60 fps with 90%GPU and 80% CPU load
Heroes 6 (fuck you Ubisoft for killing a legendary game series!) is 80% on GPU, 100% on 1 CPU and 20% on another CPU, so obviously terribly optimized even for dual core.

On the weekend will make some tests on 720p resolution and see what will be a main bottleneck there.

Or maybe make a Xone machine for 900p gaming? :P

Yeah fair enough except for the "Are you fogetting that nVidia was responsible for almost 30% of Blue-screens of death in Windows Vista?
http://gizmodo.com/373076/nvidia-responsible-for-nearly-30-of-vista-crashes-in-2007". and it's already fix and i bet OP already upgraded to better OS

even they had a problem (Nvidia ) it almost such rare occurance. As for mantle i agree , but it's actually the same with other games that run with Nvidia excluisve so i guess this one is depend on OP

overal it's a metter of choice,.

If you have a socket 775 for that Core2duo you could almost certainly go to a Core2Quad from Ebay those things cost in and around 50euros right now and the power boost you'll get will be massive.

If you're thinking about upgrading to 8gb of Ram you really will need to make sure your MoBo can take it, a lot of 775 socket ones cap out at 4gb, a tell tale sign of this would be if you right click on "Computer" and check how much ram is showing up there as useable because with a 1gb card you should already be running into memory addressing issues.

Also remember that if you want to go to anything over 4gb of memory you'll need to be using a 64bit version of whatever version of Windows you use, 32bit versions are capped at 4gb without some serious work arounds.