98% of the games in Mame will play just fine with this setup.  However, it's those games you just mentioned that might have a couple issues.  *Might*, I said.  I'll be curious to see how you fare as well.  In fact, my purchasing decision is hanging on how you fare.  I've got a cab set up for fighters, with a 450MHz board right now, and of course I can't play any of them as it's far too slow.