Strange Question but why would you get the 60gb if you dont have ps2 games in your list. My 80gb plays PS1 and PS3 games just fine
Elder Scrolls Oblivion
Sega Classics (that big Sega Mega Drive Colletion with Altered Beast etc)
Because if I had to choose one of my PS3s, that would be the one I'd take. It's PS1 functionality is also of better quality than my 250GB slimmer model (many people probably don't know that).