Best First Person Online shooter for the PS3

I just sold my 360 to buy a PS3 and was wondering what PS3 FPS has the best online, including competitive play, the size of online community and the enjoyability of the game. I was considering the following games:

Call of Duty 4

MAG

Killzone 2

Please do not reccomend Modern warefare 2 because I find that IW got to cocky and **** it up

For me Battlefield: Bad Company 2 & Killzone 2

BFBC2 because its just that good. I love blowing up walls and destorying buildings. The guns to me are the best part it feels real. I hate tanks but oh well i use them too feels cheap killing people with it. But i feel powerfull when i kill people in tanks so win win.

Killzone 2 is awesome game its hard at first but it is so fun. Also you can play with bots then you can play with all the unlocks if you want to.

I would definitely recommend Battlefield: Bad Company 2 if you didn't have that on your Xbox 360. Is a great game that I've been playing for a while now and I don't plan on stopping anytime soon.

resistance 2

I like Resistance the original online better, but Resistance 2 has like 30 on 30 deathmatches.

Killzone 2

MAG.

BFBC2 is awsome played the beta loved it. Started Killzone 2 good game. Bioshock is great 1 & 2

bc2

I loved Modern Warfare 2 :D

Bad Company 2.

Killzone 2 is nearly as good, but I couldn't stand the main campaign which was not very good nor entertaining. (I'm more of a single player gamer, most of the time)