Newegg.com has the Polk Audio RM510 5.1CH High Performance Surround Sound Speaker System for a good price.

Item has a rating of 5/5 from 33 reviews

Google Products Price : $379.99 ~ $399.99 Shipped

1. Newegg Price : $399.99 Shipped
2. Use coupon code EMCKCKE75 to get $150 off ( Exp : 7/6/11 )
Final Price : $249.99 Shipped