You can get rid of the sound card because all the motherboards come with intergrated sound and it's usually HD sound so it's good enough. I have a super high end system and no sound card , the sound comes from the motherboard and is very good.
So take that money from the sound card and put it towards a video card I know it's not much of an increase but maybe you can get a GTX 570? Also you can get a less expensive cpu cooler since you don't really need the H60 and with the additional savings the 570 may be in the budget.
I'll list you choices followed by comments / suggestions:
CPU: Core i5-2500k - HT will give a significant boost in video editing...if you can justify the 2600k, you can certainly justify the 2700k as it's the exact same price ($320 - $20 off w/ promo code EMCNDNB33, ends 6/14 )....the 3770k would be the "current generation" choice tho.
Cooler: Corsair CWCH60 Hydro Series H60 - Not a good choice. Most decent air coolers embarrass the H series coolers and do it w/ less noise
Sound: Creative Labs Sound Blaster Audigy 7.1 - Drop it, redundant, already on MoBo
Drive: Lite-On Internal DVD Writer - Given the price of BR media, might wanna reconsider whether you need to write BR and just write DVD's ...tho goven the current price difference of 412, doesn't matter a whole lot.