The PC Engine port is by far the best. Have you even tried playing on a Genesis or SNES with their stupid AC adaptors? The PCE AC adaptor seals the deal for me, who cares about graphics, sound or features if the power supply sux? Don't even get me started on attempting to play SFII on a 32X/Sega-CD combo... if you thought that SFII was bad enough on Genesis already, it is at least three times as shitty with the full setup. I don't know what it is, but you can just feel the sluggish power consumption. End of discussion.