I could do Xanadu 1. All the Tengai Makyo games are cheap as hell though. It would be worth the $15 or whatever for Manji Maru or Kabuki Den. They are both awesome. I know this because I've competed the first 3/4 of both of them before bailing out for some stupid reason.
I'm down for picking up any of the Tengai Makyo's, I've been wanting to play them anyway.
I think we need a poll, if I don't own whatever game we decide on, I'm down to pick it up assuming it's not too pricey.