Any other suggestions though? I'm thinking LBP... I dunno, not that big of a collection that I don' already have on my 360.

No, I'm not rebuying games just to have them in Blu-ray, so if that's what your saying, than beat it.

Congratulations.
Seriously, get LBP, and Valkyria Chronicles.

Edit: Forgot about Resistance 2.

mgs4 is a really good choice i highly recommend it. pick up hs as well should be in the value bin or used section. its good for a few hours. Also reccommend resistance and resistance 2. I cant really say i reccomend lbp. I returned after only having it for the weekend. to me it was the worse decision i made buying into the hype. Just my opinion so rent it first see if you like it, but get mgs4 its worth it.

Man enjoy that Mgs4 Great game and congrats on the Ps3.

Congratz!

Must buys:

LBP
MGS4
Uncharted

Other recommendations (in order of my liking):

Ratchet & Clank Future
Ratchet & Clank Future: Quest for Booty (PSN)
Heavenly Sword (though it's short - buy it for cheap)
Valkyria Chronicles
Resistance 1/2

Then wait for Killzone 2 in a month and a half!

I didn't see any JRPG's in your library so I'll assume you have some aversion to them and instead recommend that you look into LBP since you have a decent number of platformers in your library as well as Uncharted since you seem to like shooters.

LittleBigPlanet and Uncharted are absolutely incredible, they are must haves

you gotta get LBP,R2,Uncharted.

Besides MGS4 I'd say Uncharted, the Orange Box and GTA4(if you don't have them on 360), Resistance:FOM and Socom. Socom is freakin addicting. Best console based multiplayer I've tried.

Resistance 1 and 2 and motorstorm 1 and 2