Here's a suggestion. Scrap the Soyo KT400. It's a VIA chipset, and it is just not as powerful as boards with nVidia's nForce 2 chipset. For video editing, you will need all the throughput you can get, and nForce2 memory controller is the fastest way to go with AMD processors--bar none. It's also much better for games. nForce2-based motherboards are also very stable and have mature drivers. There really is no reason to go VIA, since nForce2 boards are not that much more expensive. I don't think you could find a person on this forum who would prefer the KT400 to ANY of the nForce boards.
That being said, MSI currently has the highest-performing motherboard utilizing nForce2, and they give you a nice software bundle. The MSI K7N2-L would be a great choice. ASUS is feature-packed and has very good performance, but has certain random problems that keep me from wanting to recommend it. The Abit NF7-S also has a very good reputation.
The only other thing I see is that your 80 GIG harddrive might be too small--depending on how much video editing you plan on doing and storing. Video eats up hard-drive space like almost nothing else. You might want to spend a little more on a bigger hard drive, or buy a second hard drive to store files on. And like the previous poster said, I would avoid IBM hard drives. Western Digital, Maxtor, or Seagate would be better choices. I would probably go with the WD myself.
You choice of graphics cards is perfect. I think the Audigy is a good sound card, though there are Creative bashers who will tell you differently. You MIGHT consider Audigy 2, but I can see how the price difference may be prohibitive.
<-----Insert witty sig line here.
<P ID="edit"><FONT SIZE=-1><EM>Edited by Twitch on 03/15/03 07:04 PM.</EM></FONT></P>