Recommendations on an FPS game?

Hi, I'm really in a craving playing an FPS now. I only have a PS3 and a "low specs" laptop. I'm almost done beating Fallout3 and I poured in about 62 hours into that game. I played that game so much that I want to take a break from it and play a normal FPS rather than a Western RPG. I'd like one with a good campaign. Online play is nice too, but thats secondary. 

Does anyone have any recommendations? It could be on PS3 or PC. But just remember, I have a low specs laptop.

Here is a list of FPS games that I already beat:
Resistancce Fall of Man
Resistance 2
Resistance 3
Battlefield Bad Company 2
Modern Warfare 2
KillZone 2
CoD: Black Ops
Modern Warfare 1
Borderlands
Crysis2
ModernWarfare 3
KillZone3
I have Borderlands 2 but I just don't feel like playing it because it reminds me of FO3, it'll leave a stale taste in my mouth. I want to play it only when I feel like I'm in a "loot and shoot" mood again.

Some games that are in my radar, but let me know if I should get them:
KillZone HD (psn)
Call of Duty: WaW (because it's only 15 bucks)
Medal of Honor 2010