need recommendations for sub for music


Hi Everyone,
I recently completed my HT set up with a Sunfire HRS. I love it for its power, tight and clean bass and compact size. But I thought I'd get another small used Sunfire (the Junior, for example) to complete my 2-channel mostly music set up in the family room. It has to be small and cannot be placed in a corner, unfortunately.
But I also wonder what other subs are out there to best complement my system. The family room connects to other rooms in a very open floor plan. I have the Denon AVR2808ci receiver and a pair of Paradigm Studio 60s. The set up is mostly for music.
I have a small budget, so I am looking for a used sub on this site.

Thanks for your suggestions
dogmatix
Dogmatix, you need to look at the specs on the JL's. Very powerful and musical. When talking about cable channels and no corner placement you need lots of power and excursion. JL F113, Velodyne DD18 or SVS Ultra 13 minimum for an open floor plan. JL is small and is built to very high standards. Try and demo some of these subs if you can.
Thanks, I will try to demo the suggestions. If the EMB-1000 is a passive sub, I will rule it out since I want to keep things simple for the wife's buy-in.
I previously owned a lower-end Hsu, and did not like the build quality. Perhaps, the higher end jobs are better built and musical, but I will look elsewhere from now on.
I have been impressed with the JLaudio specs. I will demo those as well as the Velodynes. I will look at the SVS, although I thought they are ported and, thus, not ideal for music?
Passive radiator designs can be more difficult, but not impossible, to integrate into a music only system yet they work terrific in an HT environment. Since you have placement restrictions I would suggest using the Velodyne SMS-1 calibration system to equalize the subwoofer to your system and the room.

Musicality in a subwoofer is usually more about proper equalization of the subs overall output than the sub itself.