Just my 2 cents.. If you can track down a pair of Rocket UFW-10 subs you'd be very happy.. Best small sub I've ever heard, I picked one up a couple years ago (only needed one for the size room we have) and I couldn't be happier. Incredible performance for a smaller sub, if your mostly into music it's just perfect, it's quick, tight and can go deep and as far with HT I have absolutely no complaints, does a great job. I still have some of the reviews bookmarked I'll post here, only problem is I see they no longer build this sub, not sure why for it was one of they're biggest sellers.. I have the Rosewood finish model, has a glossy Piano black top and the included brass spikes with discs under them(hardwood floor protection) only reason I mention the finish & feet is because I have this sub in our main living room and it blends in nicely, not like most subs that look like a black box in the corner.. Actually my wife has a tall artificial Fiscus Tree on top of it, believe me if looked bad or out of place she wouldn't be shy letting me know :)..
http://www.goodsound.com/equipment/rocket_ufw_10.htm
http://www.audioholics.com/reviews/speakers/subwoofers/av123-rocket-ufw-10
http://www.hometheaterhifi.com/volume_11_2/onix-ufw-10-subwoofer-5-2004.html
http://www.goodsound.com/equipment/rocket_ufw_10.htm
http://www.audioholics.com/reviews/speakers/subwoofers/av123-rocket-ufw-10
http://www.hometheaterhifi.com/volume_11_2/onix-ufw-10-subwoofer-5-2004.html