Hmmm, I already own or have played to death most of what I care about this gen, which was already in HD (although I'd definitely buy the original Bioshock again if it ran even smoother and at full 1080 and featured pointer controls), so my list would be better focused on Wii and 6th gen games.
Zelda: anything, but Wind Waker most of all (running in 1080 and widescreen, but leave the controls alone!), MM and Ocarina in HD/widescreen, and of course, SS and TP
Metroid Prime Trilogy (would gladly buy it again just for the original in HD)
Super Mario Galaxy collection
Resident Evil 4 (even though I already own it twice)
A Red Dead collection (I really liked Redemption)