I would change the HD for the samsung spinpoint F3 or the WD black caviar 1tb, go for the cheaper.
you seriously overpaid for the gpu, the added memory wont bring you benefits in such res, for the memory to be a factor you would have to have a res like 2560*1600, and this card cant handle that.. one good gtx 460 1gb version can be found for 179.99, the MSI one. There is also the AMD 6950, which starts at 239.99 with a rebate, its a saphire card
http://www.newegg.com/Product/Produc...82E16814102921
the good thing is, its more power with a little more dope, and the best thing is that you can flash the bios of the 6970 and get a full functional 6970 without the added price. (if the flashing goes wrong you can revert to the original one, this is currently only in this card as far as I know)
There is also this one
http://www.newegg.com/Product/Produc...82E16814121424 the gtx 560ti, which is a good card, but with a good competition in price due to the 6950 1gb version debut, they are both roughly the same in power, of course if you flash the 6970 bios, the equality is lost, and the AMD is a win, being cheaper at the same time.
the psu appears to be good, but check with mcrusty
The mobo is a good one, since its a desktop there is no sense for you to wait for the z68 chipset (unless you do rendering and some other stuff that would improve using the igpu that the SB chips come.)
Im not a fan of that case, I like things with a more toned down look, but the case is good, and at that price a good choice.