Finest subwoofer for music under $1,000?


Suggestions? Particularly for classical - orchestra CD's...?
hstokar
paradigm's new pw-2100 for $730 retail is very good...nice 10" driver w/ 400w amp.
Infinity Alpha 1200S sub. My friend is using this on his Canton monitors. This sub lists for like 750. It sounds great on music
It uses that Rabos technology which is an equalizer to make sure the sub blends in perfectly to the speakers. It uses a Ceramic alluminum 12 inch woofer and a 500 watt amp. Here's a pic of it. http://www.infinitysystems.com/homeaudio/images/products_large/ALPHA1200SBK.jpg
Brand new ACI Force, well under $1K or IF you can find a used ACI Titan. Easily comparable and in some ways superior to REL.