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 261 reviews

Google Products Price : $80.75 ~ $108.24 Shipped

1. Newegg Price : $69.99 Shipped
2. Use coupon code EMCYTZT1621 to get $15 off
3. Rebate Price : -$20.00 ( Exp : 5/21/12 )
Final Price : $34.99 Shipped After Rebate