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 256 reviews

Google Products Price : $74.98 Shipped

1. Newegg Price : $54.99 Shipped
2. Rebate Price : -$20.00 ( Exp : 4/30/12 )
Final Price : $34.99 Shipped After Rebate