Raystorm
Raycrisis
thunder force V
thunder force VI
Night raid
Gunners Heaven - CP controls may be awkward
Tobal 1,2
vib-ribbon
Incredible Crisis - the OG PCB is not really needed. The PSX game is fine
Just about any of the rhythm games
Dragon ball GT PSX
Gundam: Battle Assault 1-3
Dead or alive 3
Dead or alive 4 (more of a 720p game.
Vewlix Console I/O project)
Street fighter 3rd strike on Xbox360 is cost effective
Psychic Force 2012 is a odd PCB. a DC would be a space saver
The King of Fighters '98 Ultimate Match / cost effective
The King of Fighters 2002 Unlimited Match / cost effective
Tatsunoko vs. Capcom: Ultimate All-Stars on wii is arguably final REV.
Someone mentioned character saves in MvC2
Tekken 4 needs a dedicated 246 if your using a 256 for everything else.
Setting up 4 player Naomi/DC games is probably easier just using a DC and jammarizer.
Just about every PSX game before the implementation of analog sticks, 98' ?
The Bad
Instant brain's version of Dodonpachi is not the best.
DDP DOJ on 360 is unplayable IMHO. It's a port of the PS2 version and load times brake the game. Even with the patch. It takes 2 minuets of loading to quit game and restart your run. Hard game, not everyone is going to want to play it anyway.
other than that the CAVE games are all fine.