Go for Eschatos on 360...lots to do in that game, has the two Wonderswan games, is cheap (new budget version out there for $30). Also Mushi Futari plat, if you don't have it already. Border down is pricey there, above $100 for the standard, used.
Second Milestone has everything in the first and then more...renders the first release obsolete.
And for PSP, Darius Burst. It is still expensive to import but you could get it there for cheap. Not as good as the iOS version since that has Another Chronicle, but awesome since it is not touch only. Don't forget the other PSP Konami collections. And there is that neat PC Engine collection in PSP that had Sapphire...worth getting if you can find it for less than $10.