looks good except for your video card and ram, its not a bad one, just doesn't line up well on a price performance curve vs ATI's offerings. even tho they are getting scarce, x1900XT's are a better deal. but if your partial to nvidia then just go ahead and buy it.
the ram, go either 533 or 800, 667 usually doesn't have enough speed over 533 to overcome its higher latency, to any noticeable difference. and if your overclocking 800 is nearly a must with conroes, because of the insane overclockes you can get, and is much faster then either 667 or 533
the PSU might concern me... 450 watts is defiantly enough so long as its a solid 450 watts, IE 450 watts sustained, not 450 watts peak.
honestly i would go for some DDR 800 its reasonable in price and has decent timings. just remember that faster ram is useless (if your only gaming) and is only useful for overclocking. just to keep in mind if your penny pinching ($10 isn't allot tho)