Gamecube:
Metroid Prime Series (likeliest to buy 2nd, 1st)
Animal Crossing (Maybe)
Super mario Sunshine (Will probably borrow from jameel)
Ledgend of Zelda: Windwaker (Maybe)

PS2:
God of War (Depending on Review)
Devil May Cry 3 (Depending on Review)
Kingdom Hearts 2 (Depending on how fun KH1 is and if its worth getting another)