I'm about to purchase a new, or used PowerMac. I need to have dual processor G4s. That's my main requirement. So, do the new PowerMacs suck? I've been hearing lots of horror stories about excessive noise and heat and a bunch of other stuff. Anyone here got one? Like it? Hate it? Would I be better off with a Quicsilver or should I wait a few more months and see what shows up?