Sounds great to me! I edit High-Def content all the time using a basic Acer desktop with a Core 2 Duo 2.53 Ghz processor, 4GB of Ram, and an older Radeon 65XX video card. My NLE of choice is Vegas Pro 10 and I often edit projects with a dozen video tracks and half a dozen audio tracks and have no issues whatsoever other than some slower rendering processes. I’d love to be able to edit on a system like you are considering. If you can afford it, go for it!
-Wayne-
