Right. So, so far (for the close future), I have decided upon:
1) Halo 3
2) Lost Odyssey, IU
3) Ace Combat 6 (forgot that exists!) and Pro. Sylpheed.
SHUMPs, all mentioned I was aware of
Gears.. i will have to watch a lot of gameplay. It has frequently put me off by its macho nature, and considering it'd be a coop game for me my g/f, it's a touchy choice (even if hella cheap).
Keep 'em coming! Especially multiplats with the PS2 for example.