Happs competition pushbuttons are reallllllllllllly good for fighting games, the short distance, light spring, and rounded top really help for incredibly fast button pushing. I went with the happs horizontal pushbuttons on my mame cabinet, and I'm happy with em, but as I look back I think I might have gone with competitions if I knew they were as good as they are. Well if you're an old-school freak, then definitely go with the horizontals, but if you're into fighters and newer shooters (Mars Matrix, Ikaruga, Bangai-O, etc.) go with the competitions.
-CthulhuLuke