I suggest you get the PS2 games instead, because there is a slight input lag when using keyboard or joystick on MAME, as such is the nature of emulators, which escalates into major problems when tapping combos on games that require precise input such as music games. What would be 'Great' on arcade displays as 'Good' on MAME, for instance. The PS2 versions however, aren't emulated versions of the games, they're arcade perfect, so no lag whatsoever, no matter how few the milliseconds
Whenever I goto the arcade to play beatmania, I have to readjust my play because I get so used to tapping the notes early on MAME to achieve greats..