As always, I'd recommend Mass Effect. IMO, it's easily the best game of this generation.
If LIVE's your thing, you may want to try Rainbow Six: Vegas. Its co-op and terrorist hunt modes are good fun.
For a great single-player experience, I suggest you look into Dead Rising. You can buy it for dirt cheap nowadays, and there's a demo available on XBL if you'd like to take it for a test drive.
And personally, I enjoyed Gears 1 more than I enjoyed Gears 2.







