Best new FPS for 360 online play?

[thekirbyfake]

Been playing BF:MC on the 360 for a while now, almost all online in the huge multiplayer Live arenas.

With CoD3, GoW etc. out for Xmas it sounds like BF is likely to die. (Not a bad thing considering the amount the servers crash!).

I find myself strangly drawn to being killed by pre-pubescent Americans so I'll be getting one of these new generation FPS games.

Any experience of these new games in online multiplay?

[thekirbyfake]

OK then, now that they're both out (GoW & CoD3) and I've noticed a few of you playing them, which is best for online multiplaying?

I had a go on the Rainbow Six Vegas demo the other day and was very unimpressed.