I got mine to replace a dual 1 GHz G4 last weekend. It feels a bit sluggish compared to that computer, but I think that's understandible given its size. I too will be editing using FCP 4. I have a pretty hefty project (It's on 9 DVCAM tapes right now), so I think I'll be putting it through its paces, but it is a very good machine for me.