Subwoofer for Both Music and HT

REL subwoofers will let you setup the sub for both music and HT separately; speaker cable hookup for music; audio cable for HT. They default to the music connection, and switch automatically to the HT mode when a signal is received from an HT decoder. (Some HT sub outputs always send a signal, so you would need to see if you need to manually switch.)

REL's are also nice subs regardless. The "ST" models (STratus, STorm, STadium, etc) are tuned primarily for music, and also do great with HT. Conversely, the "Q" models (Q150E, Q201E, etc) are tuned primarily for HT, and are still very musical. I own one of each (separate systems).

REL's are also easy to setup and integrate with your system. There are frequently some for sale or auction on Audiogon and eBay.
Happy listening!

Sounds Like Sugar is all over this question, and I'm sure knows more about subs than I do, however just to through out another suggestion, the Paradigm Servo 15 is a very high regarded sub. Velodyne is also a great sub maker, but I think that it is geared a little more towards HT (it's not fast enough for music) but I wouldn't quote me on that.

Thanks for the info Sugarbrie. I am familiar with REL but did not know they allow you to set them up seperately for music and HT. Will check them out