Intel - 2 66ghz I7 Quad Core 8mb supported mother board

If you live near a MicroCenter they have I7 930s for $199 its a great deal if you dont then an I5 750 would be plenty of power for video editing.

I5 750 Quad core @ 2.6ghz with turbo boost upto 3.2ghz and 6MB of cache $194.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115215&cm_re=I5_750-_-19-115-215-_-Product
19-115-215-TS


It is really the best bang for the buck at the moment.