3D Dot Game Heroes for sure. You could get that + a $20 budgeted title.
Honestly though I would say you should pick Red Dead Redemption fro the list you have shown. That game looks bad ass and should provide plenty of replayability.
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)