I am a little biased but I would stick with the Mac. I am an engineer in LA and have worked on plenty of sessions around town for major labels. I have never scene anything but a Mac in a session for recording or edititng(lots of pc's for sequencing). Better than 90% of those sessions used some level of ProTools. The only downside to the Mac is the lack of PCI slots. Like all of the recent Mac's the G4 only has 3 pci slots. ProTools needs to see an UltraWide SCSI card so now you are down to 2 slots. I have the Mix Plus set up which takes up the other two slots. If I wanted to to add a second monitor(which I do) and another DSP MIX farm card for more TDM fx(again, which I do) I need to buy a PCI expansion cage. The MIX farms cost in the neighborhood fo 3,000 so I'm not ready for that yet, the cage is another 1500.
You could run the same type of set up on a PC but you need to be running WindowsNT. That would take care of the slot limitations, but my narrow thinking is if every session is using a Mac I'll contiue to get work by having a Mac.
Good luck
jamie
[Edited by jamiecer on 09-02-2000 at 11:25]