I'm running four clients each in their own directory on a AMD 64x2 4400 with a gig of memory and a 1900XT 512MB. Three clients run at 560x525 and the main at 1680x525 and each one is getting over 40 fps at a minimum. Haven't taken them to a major city yet and I'm expecting that to be a slide show but who knows.

A couple months down the road I hope to add another monitor and some memory so I can add my fifth character. Adding another monitor will probably be a bit more resource heavy but I'm optimistic.