The zalman doesnt rate well as a cooler , check out frostytech
the 750 gig drive is slower than a 640 or 1 gig
x48 mb is very expensive , so if you are only using one gfx card stick with a p45 mb , and dont buy "features" you will never use . Id stick with a ddr2 mb since the whole 775 platform is finishing
850 watt psu is way overkill . Once its dead you dont shoot it again cos its a waste of bullets , right?
650watt for 1 4890 , 750 for 2 in crossfire