I pieced together a system for a friend looking at a similar budget. I think this falls in around $950 so there is room for changes based on your preferences. The system under full load should reach at most of 350-400w. First PSU is better bang for the buck antec green second PSU is their 750w psu that is on a bit of a deal this week at newegg.
CPU - http://www.newegg.com/Product/Produc...82E16819115072
RAM - http://www.newegg.com/Product/Produc...82E16820211457
VGA - http://www.newegg.com/Product/Produc...82E16814102949
Mobo - http://www.newegg.com/Product/Produc...82E16813157250
Case - http://www.newegg.com/Product/Produc...82E16811112238
PSU - http://www.newegg.com/Product/Produc...82E16817371049
DVDRW - http://www.newegg.com/Product/Produc...82E16827135204
HDD - http://www.newegg.com/Product/Produc...82E16822136794
CPU Cooler - http://www.newegg.com/Product/Produc...82E16835103065