AVID and Ulead are not related expcet in having a similiar name. Pro level proggies (like AVID) are only certified to run on specfic systems(If you go to
www.avid.com you can find a recommended hardware and prebuilt system list). Just like Pro or Prosumer level editing hardware won't run w/all hardware combonations(Canopus, Matrox, etc. all have recommended hardware lists). This is one reason why Mac's are so popular. A G4 is a G4. Manufacturers don't have to worry about different procs, chipsets, mobo's, etc. Makes R&D and tech support alot easier.
FCP is Mac only. AVID and Premiere are sold in PC and Mac versions. In my experience AVID software runs much better(more stable) on Macs. I've never used Premiere on a Mac, only on PC. If given the choice between PC or Mac, I'd always pic Mac. I'd never edit on a PC unless I had no other choice.
That said, I built a video editing PC around the Matrox RT2500 video capture card and Premiere 6.0. I've had a couple of bumps in the road, but she's done everything I've asked of her.
My biggest suggestion is to pick what video capture card you want (Matrox, Canopus, etc.) and follow the manufacturer's recommended hardware list. Or, if you have the money for AVID, find out what hadware AVID supports and go by that list.
Lethal