hey I'm currently a PC user but hope to soon make some major upgrades to my current setup. First of all I'm trying to get a mac, which I've wanted since I got into digital audio. I recentley found a used G4 for $1000 on dvwarehouse.com. Here's the specs: The Apple Power Macintosh G4/800MHz Dual Processor QS, dubbed 'Quicksilver' for its revised case design, features dual 800 MHz PowerPC 7450 (G4) processors (each with the AltiVec "Velocity Engine" vector processing unit), a 256k level 2 on-chip cache and one 2 MB level 3 backside cache. In addition, this model ships with 256 MB of PC133 SDRAM, an 80 GB (7200 RPM) Ultra ATA/66 hard drive, a CD-RW/DVD-R SuperDrive, an NVIDIA GeForce2 MX TwinView (AGP 4X) video card with 64 MB of SDRAM. A digital audio sound system with Tripath 'Class T' amplifier rounds this unit out, all encased in a translucent silver and white tower case with a fold-down side door that makes upgrading effortless I have a few questions: what's a QS processor and is it any different from processors in other macs? Also is this a good buy or could I get something better for the money? How many firewire and USB 2.0 ports does it have? If this PC comes with an older OS like OS 9 can I upgrade it to OSX for a small price? And lastly but most important is this a good computer for running protools LE with either an mbox or digi 002r?