If I was buisling a mega super awesome PC for that much money, I'd get something like this.

CPU - Intel i5 2500k (don't even look at anything else) ~$200

Mobo - SLI/Crossfire capable mobo made by Asus, MSI or Gigabyte ~$140

GPU - 6970 or GTX570. ~$320

RAM - 8 GB (2X4GB) tripple channel DDR3 ~$100

Case - Full tower case with lots of fans ~$120

HDD - 120 GB SATA 3 SSD 1 TB 7200 RPM hard drive ~$200 ~$60

Power Supply - 800 Watt Antec (or similar quality brand) ~$130

DVD DL Writer with Bluray OR DVD DL Write BLuray ROM Drive ~$100

CPU heatsink - Noctua NH-D14 ~90 bucks

I'll actually be building a monster PC myself in about 3 months. My Phenom II 940 CPU and mobo architecture is sturting to hold back my frame rate and I am changing to Intel camp.

http://www.microcenter.com/search/search_results.phtml?N=4294966995 4294964566 4294963068&sht=Any&prt=NewProduct&

There are 2 i7 cores that cost $225....but after looking at your build I have to say i'm liking it alot. Just a few questions that I have though.

Ok so we'll probably go with the i5 2500k for the processor and the GeForce GTX 570 for the GPU. Now what i'm wondering is which mother board would support both of those and a USB 3.0 and SSD drive? 

Also why the CPU heatsink? Doesn't the Intel i5 2500k have a heatsink on it?

When it comes to mobo, look for a reputable manufacturer. ASUS is usually the best when it comes to overclocking options and sheer reliability.  4 RAM slots is also a must.  I would also look for a mobo which has 2X PCIe 2.0 x16 slot. The first slot is  x16, but make sure the second slot is at least x8...a lot of them are just x4 for the second which isn't enough if you ever decide to SLI 2 GTX570s. Don't go for a 3 way SLI mobo though unless you're spending more than 250. Sub 200 mobos with with 3 PCIe slots are questionable quality or useless (PCIe X8,X8,X4 speeds are pointless)

140 bucks spent on an asus, MSI or EVGA motherboard should buy you a good product. You need a 1155 sandy bridge compatible socket. Intel 1366 socket ones may be on sale, but they are no good for the newest i5...

And the CPU cooler which comes with any Intel or AMD chip blows. You really need an aftermarket one to do any sort of overclocking.

NH-D14 is the best air cooler at the moment and is not too expensive for how good it is. It even beats a lot of water cooling solutions. Beware though, it is MASSIVE and you need a big case.

Lol most of the bolded didn't make much sense >_<

My biggest fear is we talked to my uncle and he said building your own computer is a pain because getting everything to be compatible with each other can be pretty tough....he said if you screw up and something turns out not to be compatible with the motherboard your out all the money you spent on it. 

Would a motherboard like this support the GTX 570?  Cause this is the one I'm thinking of.

And are all Harddrives and Solid state drives compatable with pretty much everything?

Getting everything to work can be tricky if you've never done it before even if you have the right parts. But compatibility should not be a problem if a little time is dedicated to research. Do save your receipts though :)

That mobo will work with i5 sandy bridge. It looks like a good mobo...the only drawback is PCI Express 2.0 x16 - 2 (supports x16 or x16/x4)

You may want 2 but at x16/x8 or x8/x8. This is only if you consider adding a second gtx570 video card down the road. If you plan to use the one till the computer craps out, you're good with ths mobo.

All hard drives these days work off SATA ports. You can have 3G or 6G SATA hard drives. You can guess which one is better and faster...Most 1155 mobos should support both so you're good no matter which you decide to buy.

You really want a SSD hard drive as your boot drive as it boots windows in less than 1/2 the time and runs important programs in a snap. Disk hard drives are best for storage of music, movies and other things like that...

Ok thanks for the advice. One last question (for now lol)

How can you tell what different graphics cards will work with motherboards? Like will the GeForce GTX 570 be compatible with the motherboard I showed you above?

Edit: Thought of another question. Just how big of a case do we need for all the above to fit?

All motherboards and graphics cards are compatible with eachother, unless one is seriously outdated.

And high end graphics cards tend to be very long, up to 12 inches, so you might want to look for a deep PC case built for high end systems.

Thanks that was very helpful! So really its just the processor that we have to make sure is compatible with the motherboard

^^K thanks man!