Wiped on 02 February 2009
You can't go wrong with Okami and Super Mario Galaxy. Galaxy destroys Sunshine, blows it well away, and these two games are definitely cream of the AAA crop (Okami and SMG). I don't want to reccommend anything less than brilliant as you're on a tight budget.
Obviously, as FPS things go, it's a bit light, but the much-hyped The Conduit is landing shortly, and Call of Duty: World at War is apparently very decent.
I'd swerve 'classic' Sega though. Nights is terrible, and the Sonic games have been hit and miss, mostly miss. Some new IPs coming up from Sega look much better; namely, Madworld (google it) and the aforementioned The Conduit.
