I've fallen in love with the PS Vita, it would probably be the first console I'd look towards if I decided to complete a collection for a console. Especially since it's doomed to probably not have all that many releases, so it probably wouldn't be too difficult.
I guess that'd mean buying up all the gimmicky touch control-laden filthy mucky muck that's dirtied its reputation too but yeah. Go buy a Vita. It's good.