I'm not sure how much money you wanted to spend, but check out the Vandersteen V2W sub in a dealer demo. It's what I've got in my 5.1 home theater and I love it! Sells for $1200 new. It actually received 5 stars in practically every category in Widescreen Review Magazine subwoofer review issues last year. One of the only subs that scored higher was the Revel B15, which is an awesome sub but much higher in price. Good luck to you.
Which sub would you choose?
I am considering buying either two Audio Physic Minos or a single Wilson Audio Watchdog. My room is 15 by 20 with 10 ft. ceilings. I use the system equally for two channel and HT. My equipment is as follows. CB2 processor, Faroudja video processor, Front left and right and center speakers are Kharma 3.2 floor standing monmitors, the surrounds and rears are Aerial Acoustics LR3 and SR3. The front projector is a Sony G70. I have heard great things about both subs. Which would work best for me?