I picked up quite a few used Power Mac's (7100, 8100, 8500 w/Sonnet G4 card, PowerMac G3, G3 B&W Mac). I gave all of them except the G3 B&W to a friend of mine. The G3 B&W had 9.1 installed so I put 10.2 then updated to 10.2.8 and I'm impressed with this old computer. I had 1 gig of memory and a 40gig IDE hd laying around so I installed it. I'm impressed. I'm going to pick up 10.4 and then see how it runs. Supposedly 10.3 runs better than 10.2 so maybe 10.4 runs good also? Anyway if it does I'll look around for a G4 tower assuming its night/day difference between that and my 300mhz G3.