I see you will be watching movies also. You may want to give the SVS PB-1000 a try, as you can have it shipped to your home for a free 45 day trial and if you don't like it ship it back. As mentioned above stepping up another 100$ will get you a better sounding sub and I don't think you'll regret it at all. Other internet companies to look into are HSU, PSA, ect.
Panasonic TC-P65ZT60, Sony PS3, Marantz SR5008, Center PC2000, Front & Surround's PM1000, Sub SVS PB-2000, Harmony Smart Remote
Panasonic TC-P46S1, Panasonic HTIB SA-BT200