Please state why, and which game will sell more and by what percentage...

I want LBP2 because it's not a shooter, it looks fucking awesome and the first game was incredibly fun to play with my mates.

Halo: Reach is going to sell more though, probably at least 100% more than Gears of War 3, followed by LBP2 and SOCOM 4 last.

Gears 3 I guess, I'm not really hugely excited about all of them.

LBP2 -- I'll likely get it but I only liked the first so much so it's not hugely anticipated.
Halo: Reach -- don't care
SOCOM 4 -- What's a SOCOM? Whatever it is, I don't care.
Gears 3 -- I loved Gears and Gears 2 was fun, though I never finished it. It just kind of lost steam for me.

You guys really thinks gears will sell more than LBP2? LBP1 sold a ton of copies and moved consoles even though the PS3 wasn't doing so good. I agree that Halo will sell the most because let's face it Halo IS the 360 but I think LBP2 will arrive on a Halo sized hype train.

LBP2 - don't like fps's tbh and I don't own an X-box.

LBP will sell well but mindless Halo fan boys will buy halo and Gears 3 will be popular. I've never played SOCOM so I don't know about that.

LBP because it is not a shooter.

Well my most anticipated game by far is Red Dead Redemption, but Gears 3 triumphs out of those by far, that game looks amazing

Halo: Reach > Gears of War 3 > not so much interested in the other two. Same order for sales with LBP outselling SOCOM.

Halo Reach, because Halo's online is awesome (I mean the gameplay wise not the online community, Live's got the worst online community ever.)
Next on my list would be Gears of War 3. Not interested in LBP2 because I didn't like the first one and I've never been interested in the Socom series.
As for sales Halo Reach will easily outsell the others.

LBP 2 in a heartbeat