i can already find 4 flaws here ...
1st. your mobo will not overclock well since its 4+1 phase , also it does support crossfire which leads me to my next flaw :
2nd. GTS 450 is only a little cheaper then both HD 6850 and GTX 460 both of them are mile away from 450
3rd. that PSU is bad news , if u scroll a bit throught the forums you'll understand that psu is the most important part of the whole rig , why is that so im not gonna get into details .
4th. you didnt specify the speed and latency of your ram , if it has corsair tag on it doesnt mean its gonna fly
anyway heres a build quote i recomended to another dude whos looking for a new rig also maybe u can concider some things :
Case+Psu combo216.98$ (-40$ MIR) preaty good for full tower air field with 5 fans and a 850 psu right ? btw the psu is actualy the best for its price , its rated 80+ but actualy its very close to gold rating acording to this Review efficiency is around 88-91% on all loads
Video Card + Memory combo 222.98$ (-35$ MIR !) thats right baby , hows 4 GB of 2000 Mhz ram for 8$ sounds ? now we all know that ram timings are mostly overated but i know many ppl that have this particular ram at 1800 Mhz 8-8-8-29 stable , its rated for 9-9-9-30 @ 2000 Mhz . anyway this combo is a beast !
CPU + mobo combo 243.99$ (-15$ MIR) why pay for x6 when it will be easly matched by an x4 on 4Ghz in all games ? dont be fooled by the mobo , it will support crossife and ur killer ram at 1800 Mhz , ppl are gonna advise you to get 8xx GX mobo but ask urself are u realy gonna use sata 3 and usb 3 in near future ? if so then pop in another 30-40 bucks or so .
Water Cooler 79.99$ ( -15$ MIR) ...whats that ? a water cooler for 65 bux ? take ur baby chip to 4 Ghz with this thing and crush any game that dares to visit ur hard drive !
DVD\\RW 19.99$ free shipping other then that , cant go wrong with sony .
HDD 69.99$ not as good as SSD but will do the job
total 853.97$ ....after mail in rebate 748.97$ !!! now thats the rig not to be messed with , and u got 250 bucks left to go wild , my personal suggestion is repeat Video Card + Memory combo and you will have smocking crossfire and 8 gigs of ram , or you can pop in a 100 bucks SSD in there and have ur OS fly like a JET , either way you'll be happy have fun !