I thought PD0 was bland. Maybe the multiplayer is better, but the story mode was just yawn worthy. Can't say for certain about Kameo.
GoW definitely looks good and I'll have my friend pick that up for his 360 so I can try it.
As for Dead Rising, I'm wary because I've just seen too many games which have hordes of enemies to kill wind up becoming boring very rapidly, even if there are many ways to kill them (ie Gauntlet, Hunter the Reckoning, etc.).
I'd rent first to be sure.