Well, at this point I have 66 dollars, I want a good game to buy, I recently got COD4 and I am considering KZ2, however I don't know If It is my kind of game, or how good it really is. Other Options are Valkyria Chronicles or Uncharted.

Who can help me? What other games not mentioned are worth purchasing?

PLEASE HELP!!!!

Valkyria>KZ2>Uncharted

KZ2 is great, at least the demo is, my game is not yet here.
Valkyria will be hard to find soon, get it while you can. It's amazing.

You try the demo? Either way, I think you should get Valkyria Chronicles. It'll hurt my pride and all, but... you know. = (

Killzone 2 and than I can own you online! ;p

Well it's your choice depending on which genre you want:

VC: SRPG
KZ2: FPS
Uncharted: TPS

I've only played demos of Valkyria Chronicles and Killzone 2 and the full version of Uncharted. I kinda liked Valkyria Chronicles, Killzone 2 seemed decent and I loved the demo of Uncharted; the full version wasn't any worse, either. So I definitely recommend Uncharted myself, and Valkyria Chronicles comes next I guess.

Then again, most people would probably say Killzone 2 is the best. I guess it's a lot about personal taste and mine isn't nearly always what it is for the most.

Right, unless you love FPS, I'd avoid Killone 2 as you already have one FPS (CoD4). Killzone 2 is uber-awesome, but a variety of games may make you enjoy the ones you own more. Uncharted is a great game, and is basically a shooting-heavy Tomb Raider clone; but better -- I recommend all PS3 gamers give this one a go as it's well acted, plays well, looks great, and is a pretty enjoyable romp. Valkyria I'd recommend if you're looking for a strategy game (its RPG elements are minimal); again, it's gorgeous, and plays like a dream, but it is not for everyone.

Or, better, try the demos for all three and buy the one that stands out most to you. The demos are far from presenting the best of each game at hand, but they do provide a very good idea of what to expect.

 ^This. Mark my words. Valkyria will eventually become rare and the price will skyrocket on ebay. get it now. KZ2 will have tons of copies at retail which will be available for months to come.

As much as I hate to say this, don't get Killzone 2. You just bought an FPS, pick it up in a couple of months.

For now, get Uncharted. I'm playing it through for the second time, while waiting for Killzone 2 (I get it today ) and it's a lot of fun to play. The medals, rewards and trophies give it plenty of replay value, and a playthrough on normal is around 9 hours. Hard will take longer (I'm on Chapter 9 of 21, and it's taken me around 5 hours so far), Crushing longer still.

Killzone 2.

CoD4 is nothing compared to it. Seriously, KZ2 is the best shooter, if not game, ever.

Wait for a price drop of Uncharted. If it had just came out then I would say get it. Use your money for the hottest game out right now, even though you have COD, you need to get Killzone 2.

you will diversify your library in time, but when you have ~60 at the time of the Killzone release, then the answer is self evident IMO.

-you will not be sorry.