I used to run a G4 Powerbook 1.5Ghz processor, 2GB ram, external FW HD, MOTU 896HD sound card, in Digital Performer 4.5 it was a great setup i admit, but i wasn't pleased with it's "POWER" I'd be doing a mix of 16 tracks (24/44.1) with with EQ on all 16 tracks, WaveLabs compressors on 8 tracks, reverbs on 4, and NI GuitarRig on two... and it would choke up. I was pushing it with the pugins, i know "Guitar Rig" was the ram killer/sucker (it sure did a ton more then my older G3 so i'm not exactly complaining) I've been considering getting a new mac. How are they performing????? with a macbook 2.2GHz Intel Core 2 Duo & 4GB ram, can I run 8in/8out 24/96 with an independent guitar rig plugin on each channel? or do i need a MacPro with Two 3.0GHz Quad-Core Intel Xeon and 16GB of ram what kind of processing power are you getting out of your computer?