Upload & Sell: Off
BTW, what video editing software are you using? Avid, Adobe Premier or anything else?
Sam, I'm in the process of evaluating Adobe Premier 5.5 on my MacBook Pro. I actually do most of my still photograph editing in Photoshop on the Mac and spent the last few weeks evaluating FCPX on that computer. I was surprised by how similar FCPX is to iMovie, which I think is a terrible program (one of Apple's few misses, IMO). After doing some more research, I've come to the conclusion that, for video editing, you get much more bang for the buck with a Windows machine, so I will probably upgrade my existing Windows computer. And, based on what I've seen so far of Adobe Premier, I will use that program on the Windows platform. Adobe provides a 30-day trial of Premiere 5.5, so once you get your computer built you can give it a good workout before buying. Also, keep in mind that Premiere 6 is just around the corner (might be announced at the NAB meeting in a few weeks), so you may want to wait a bit before making a final purchase decision.
The Avid software (Media Composer) appears to be the standard for professional video editors, but it is just too far out of my budget.
I think he'd be fine with the i5 2500k
If he's on a very strict budget, than I agree with you. But if not, it makes sense for him to get the most powerful CPU he can afford -- especially if he's going to do a significant amount of video editing. For just $100 more the core-i7 2600k (which is also overclockable) is a no-brainer.