I donno...I have a new G5 in the house used stictly as a video editing station running Final Cut Pro. When you say it has digital inputs, I wonder what you mean. The Mac machines are really pretty stripped down. Usually only one hard drive, a video out, a couple USB I/O's and that's it...not even a parallel printer out. How were you planning to get audio in and out of the PC? Did you get an additional audio interface or were you planning to import audio from a different recording source?
Sorry, not trying to bust your chops about going MAC vs. PC...like I said, I've got one too...the Macs are great machines. Just looking to clear up a few things.
Regards.