Anyone here knows plain no-frills Japanese style USB ones are everywhere. I mean, even Sega themselves sells those official in the US (like that PlaySega joypad).
Except what about the American kind? Or things like a Virtua Cop gun (of course VERY few monitors would support it), Virtual On sticks, that 3D pad bundled with Nights, etc? It'd be nice to have more choices on PC when it comes to Saturn.