I said Saturn down. I have a PS2 and a Wii, no need to emulate either of them. Just now I found a mini-ITX board and CPU combo that comfortably run anything SSF can throw at it for about $130. Add a case, a psu, and a $100 gfx card, and I think it'd do fine, all for around $300. If I pick the right components and maybe get a good deal, I could probably emulate the dreamcast too.