Holy crap, Gradius II.
As far as stuff I'd probably be able to play on systems I currently own, I really want to play the new Castlevania game, and even though my PC gaming thirst is currently quenched by Spore, the Peggle Nights demo, and the surprisingly large World of Goo demo (just need another $11.50 or so to buy the full versions of those two games), I really want to play Bully and Dead Space.