the X-Arcade(not Arcade X) is good for capcom games, because it uses an imitation Happs super, which is great for circular motions. If I were to buy an X-Aracade for the sole purpose of playing SNK games, I'd replace the stock joystick with a Happs Competition joystick, which uses a square box in order to feel the corners better for specials like Kim Kaphwan's and countless other SNK fighters.
BTW, unless your talking about playing SNK games on other systems, I do not believe there is an adapter for the Neo Geo.
edit: the X-Arcade is definately better, especially if you swap out the joystick. It's like playing in American arcade, as opposed to the small joystick and convex buttons prevalent in Japanese arcades, which happens to be what the Neo Geo stick is imitating.
<small>[ August 22, 2003, 08:21 PM: Message edited by: the roker ]</small>