The spec with the AMD Socket 939 is good and all but... being an Intel fanboy (yes gay I know) it might be worth waiting a few more months as the Intel Smithfeild Xxx are coming out in april time last I heard. This is a 2.0 ghz Dual Core and will run on a new Intel socket which should be the nForce 5. AMD are also bringing out a Dual Core then but I am no sure what it is and its on a new socket 1208 (I think) some large number in the thousands.
Also you have chosen two very different types of things to do with your computer. Video Editing and Gaming. Intel would be better for Video Editing/Photoshop etc but the AMD would play games better.
IMO I would wait until the dual cores are out and get an Intel :)" Dont be put off by the 2ghz, each core is 2ghz, sharing 2mb of cache so each core has 1mb of cahce and all the MMX,SSE1/2/3 technology and EM64T
Sorry for mild essay.