I have a choice to make. Should I get.... Dual 867 with 768MB Ram Combo Drive 15" Studio OR iMac 17" 768MB of Ram We are going to run office, iApps, etc. Also, AutoCad in Vitrual PC. Let me hear it. Money is not a factor, but I want this thing to last a while. It has to be between these. Are the PowerMacs really that loud?