Hey guys, I just got a 1.0 Ghz processor upgrade for my PowerMac G4 AGP 350 Mhz tower with 1.5 Gb RAM and 64 Mb ATI Radeon video card. My God it's great! I've had this computer for over 4 years and ordered the processor to see what would happen. The thing feels like a brand new machine! If anybody's thinking of dropping a ton of cash into a new tower, my recommendation is to just get a processor upgrade. I spent a little more than $229 and I feel like I'll have this computer for another 2 years or so before getting a new one. Just thought I'd share.