i thought the powersupply was a bit too powrful, but since you're gonna overclock, you'll probably need it.
CPU: the trend nowadays is DEFINITELY GET DUAL-CORE. and since you're gonna be overclocking, you're best bet is the Opteron 165.. very close in price. (a tad cheaper). if you're gonna be stubborn and stick with the 4000+, then get the sand diego, not the clawhammer.. san diego is also cheaper!!
ram: seems so expensive.. i see the timings are really tight.. i guess if you know that these will overclock really well then i guess its worth it.. or else just get faster clocked ram..(but with that you get looser timing.. so ya.. w/e!)
video card: the x850xt is good, but the 7600gt is priced very close.. check otu some benchmarks and see if the 7600gt is better, most likely it is.
mobo: donno why you picked that one.. but if you're gonna overclock, have a look at the dfi line.. (sorry i donno which ones in specific)
"Is virtue a thing remote? I wish to be virtuous, and lo! Virtue is at hand." -Confucius