Newegg.com has the Antec NEO ECO 620C 620W Continuous Power ATX12V v2.3 / EPS12V 80 PLUS Certified Active PFC Power Supply for a good price.

Item has a rating of 4/5 from 111 reviews

Google Products Price : $64.94 ~ $99.99 Shipped

1. Newegg Price : $59.99 Shipped
2. Use coupon code EMCKBHE39 to get $10 off ( Exp 8/31/11 )
3. Rebate Price : -$20.00 ( Exp : 9/30/11 )
Final Price : $29.99 Shipped After Rebate