Oh and I noticed that you don't have Uncharted, it is a must have

I say go for LBP or Valkyria Chronicles because they are unique experiences you cannot get on another console. There are a lot of other shooters you could play also instead of KZ2 especially as you own an Xbox 360 as well theres less pressing need to find another shooter.

If you want another cool game to play with friends, especially if you liked something like Castle-Crashers LBP is an excellent choice. Valkyria Chronicles is apparantly one of the best games in its genre in years and deserves more sales too in recognition.

So #1 would be LBP, #2 would be VC and #3 would be KZ2.

Besides. Call of duty doesn't exacly have this :P

http://www.killzone.com/kz/tour_round_history.psml?kz_match_id=2002923&kz_file_id=1789359


Or a real clan system integrated.

I just bought LBP for $20 (PAL VERSION, check the game page for a link to a thread with a link to where and details and itends in a couple weeks)

I only own Valkyria Chronicles.

I would say, buy VC, as it is an excellent game that brings some great gameplay mechanics that I've never seen before. A mix of SRPG and real time action game. Also, I'd pick this game up before you can't find it. Currently it sells for ~50 used, so it isn't dropping in value either. You'll always be able to get KZ2 and LBP later. You may not be able to say the same about VC.

It depends on what genre you prefer the most

I think there is no experience like Killzone 2 my friend :)  

OP I think that all three are worth getting! 

I have only played the demos of Valkyria Chronicles and Killzone 2, but judging by them, LittleBigPlanet is the best (I own the full version). It's simply more fun. VC and KZ2 might be fun in another way but LBP is pretty much pure fun. Besides, strategy RPGs and FPS games are pretty common these days while traditional platformers are not (well, strategy RPGs aren't that common but still). You'll end up having a more diverse gaming library with LBP so you'll always have something to play.

I really need to learn to express myself more clearly. That doesn't sound even remotely close to what I meant, though that could be just me.

If you have a BC ps3, get Persona 4, its better than anything available atm. I can't stress enough how good this game it. It puts all those listed to shame. It is even far better than VC.

I do actually have a BC PS3. That is an interesting notion and one I had not thought of. I might go in this direction since it'll save me twenty bucks.

GET THEM ALL.

i am still saving pennies for VC :(.