Logitech.com has the Logitech Z906 5.1 Speaker System for a good price.

Pricegrabber Price : $340.36 ~ $440.01 Shipped

1. Logitech Price : $399.99 Shipped
2. Use coupon code logi-z906-82711 to get $120 off ( Exp : 8/27/11 )
Final Price : $279.99 Shipped