i use my iMac g3 350 running mac os x 10.2.8 with my proscope as the front end, snap images from my lab desk store them on my share drive(until i build a server). ibook g3 300 192 mb ram mac os x 10.2.8 used for Genealogy research and old classic programs. ibook g3 700 mac os x 10.4.4 is dispatched to parents so they can iChat with my daughter, that because they suck and won't buy a mac yet. powermac g4 macos x 10.4.5 My main machine used for surfing, email, all thing i would like to do. iMac Dual Core 20" pretended to wife it is hers, I spend 95% time on it doing all things that might need the extra preformance. In the future my own high speed $5000 dollar Mac, so my wife can have the iMac.