check out this harmon kardon 7.1. Its on sale for $329 Its usually $599.
http://www.amazon.com/gp/product/B000BOC05I/ref=pd_rvi_gw_1/002-5582793-5360050?ie=UTF8
Also i just purchased a dayton 12" 150w sub from parts express. Its on sale right now for $120. Its a great sub for the money...