I bought an XRGB and use it for Genesis, Master System, MSX, PCE, Saturn, Dreamcast, PS1/2, NES, SNES, PCFX, GayCube, and N64.
Looks pretty nice on a 55" TV.
If I didn't have a 55" TV though, I'd just use a Commodore 1084 + Composite, or the 29" CRT I have in my closet.
I should get a PVM one day. That'd be neat.