dreamsnes

[Sephirsin]

Here's the link for Dream SNES

http://consolevision.com/dreamcast/emus/snes/

its the fastest but still slow. Hasn't been updated in about a year already.

Try Nester DC for NES

http://consolevision.com/dreamcast/emus/nes/

Now this plays at full speed and supports State Save and Game Genie.