I may be able to pick up an older Sawtooth tower in the immediate future (end of July). I am planning on maxing this thing out as I don't have enough money to spend on a brand new Mac (i.e. G5). My estimated operating budget for the project is $300~500 for the actual tower/case/original CPU and around $300 for the CPU upgrade. I plan on salvaging my current Pro Apple Keyboard and optical mouse along with the 512MB PC100 RAM currently in my iMac and my Altec Lansing 2100 speaker set. Before I go ahead and buy the Sawtooth tower I have a few questions: 1. I am looking at the CPU upgrades from Giga Designs. They have several different versions of the 800Mhz and 1Ghz G4 chip. What is the difference between the 1Ghz with the DDR L3 cache and the 1Ghz upgrade with the Synchronous Pipeline Burst (SPB) L3 cache. Both are running at the same speed (250Mhz - 1/4 the CPU speed.) Will I see any noticable speed improvements if I opt for the DDR version? 2. Can I safely overclock aforementioned CPU upgrades via the jumpers as listed on the Giga Designs website? I'm not going to try anything crazy here. I'd like to try running at 1.2 Ghz though, maybe 1.3Ghz as the Apple System Profiler apparently doesn't recognize a 1.2Ghz chip on a 100Mhz bus. 3. What type of hard drives can I put in this thing? Normal plain vanilla IDE drives? Or are these ATA drives? Is there even a difference?