Here's another guideline for a $1000 build. It has a 750 watt PS which is probably overkill but if the price is right.
http://forums.ncix.com/forums/?mode=...nt=3&subpage=1
Also you can use
shopbote to get the best prices. NCIX and Memory express pricematch most hardware.
NCIX will also build and test your computer for you for $50 along with I believe a one year guarantee. Maybe Memory Express will do the same.
http://search.ncix.com/products/?sku=7842