I think processor upgrades are great. I run a NewerTech G4 in my 7500 and if it weren't for processor upgrades I'd still be in 604 land. Supporting a family on my budget I can't simply plop down $1500 + in order to purchase a new Mac. I have to save. So even though I have the limitations of an older Mac (bus & memory speeds, etc.), I still have a G4 processor and a G4 is still a G4. I am still able to run Altivec applications as well as OS X. All for under $400 (for the base machine and memory). This wouldn't have been possible without the Sonnets, Newer Techs (I know they're defunct), Powerlogix, xlr8s, etc. I could've just used the $400 and built a 1 GHZ + PC, but then it would've been a PC (nothing more needs to be said there). Anyway, I too am waiting the arrival of the G5's. If I'm going to save and spend that much money for a new machine, you'd better bet it'll be the newest technology ie: G5. If I bought a new G4 now, I'd be kicking myself later for not holding out for the G5, when it'll probably be introduced at around the same cost of a "Quicksilver" right now. Meanwhile, I'll start saving and plug along with my trusty old G4 powered 7500 while I wait.