The biggest two knocks I see are the V8 and the ram. The V8 is pretty expensive for what you get. There are as good/better coolers out there for less. I'm also not sure I'd jump to 12GBs right now. Try a single set, get more later if you need it.
For video/photo editing it mostly doesn't matter what GPU you have. If you have an Nvidia card you can use it to do the editing, but you need the special software and I'm not convinced its better then the CPU options out there.