Request for review: new build candidate under $500

I decided to build a new system primarily for video editing.
I will use the on board video for now, and upgrade later.
Please take a look and tell me if I'm doing anything wrong.
Thx Thx

I used to buy cheaper Coolermaster cases like that one. Every single one of them, without exception, had minor quality control issues (most commonly, many untapped screw holes). All could be used, but I switched to the very similar cheap Rosewill cases. None of them had any quality problems. They're also cheaper.
If your budget will allow, check out a 790GX board. The HD3300 IGP is a little better than the HD4200 on the 785G.
The Seasonic PSU you've selected is a nice one; no complaints. Another similar option would be an Antec Truepower New 550W PSU. It is 80+ bronze certified, and semi-modular, so you'd have fewer cables.

For video editing you are going to need a stronger processor than a regor if you want to do it reasonably quickly.

I agree with jbakerlents suggestions, i would have suggested the same parts.

Dont ever get a cheapo power supply that comes in the case, watch this video if you are curious why
http://www.corsair.com/cinema/movie.aspx?id=622747

if you do swap out the hard drive and power supply for the cheaper models you have some spare cash to spend on upgrading the processor to a 545 callisto or perhaps a 550 be .

The psu you list is overkill unless you plan on fitting a top end gfx card for gaming , and the samsung hard drive is a very fast drive so its a reasonable idea to compromise in favor of a more powerful processor

And the coolermaster case is fine . It might struggle with cooling a top end processor and a pair of gfx cards but for your system its a very decent case

Thanks jbakerlent. The only problem I have with OCZ power supply is the rebate process. I heard bad things about it. So I decided against it.