It runs all right... It's an 8500 running OS 9.1, with 492 MB RAM. It runs pretty good, but... can't compare to my iMac :D
Anyway, I use my iMac and 8500 about the same, using the 8500 for Photoshop AIM seti@home etc. and my iMac for web/games. Mostly it comes down to 8500:9 iMac:X :D