Best multi-purpose subwoofer


Best multi-purpose subwoofer - meaning it fulfills my pursuit for audiophile 2 channel listening and my home theater needs. I have a large TV room 22x22x8 (LxDxH) with floor standing Von Schweikerts VR4 speakers. Room is used both for dedicated 2 channel listening as well as home theater. Unfortunately the design of the room is not the best as it has glass on one side (leading to the backyard) and laundry room behind (meaning its also the family room). Currently I have a 8 inch NHT SW1 old subwoofer which needs an upgrade. The maximum dimensions I can afford on a subwoofer is  15x18x20 (LxDxH). 
As mentioned I want to be able to connect a High Level Input (for 2 channel) and .LFE for HT - so the subwoofer will need to have both. Grace for dedicated listening as well as power for HT. The only time I would consider a larger subwoofer is if it has wireless capabilities so I can place it anywhere in the room. 
Any suggestions on which subwoofer may work best for me? 
128x128ghulamr
So whether on orchestral music, hard rock or something in between, the SVS line of subs will exceed your expectations.
Thanks eric_squires for the link. It seems to have a lot of answers to a lot of my questions.

Here is a great resource that does not get referenced enough. 

https://data-bass.com/home

JD
ghulamr, 
I have listened to REL and I have listened to SVS. All the REL subs seem very refined and when set up correctly, blend in seamlessly. The only drawback I have found is price. They are a bit expensive, but I really like the whole line. 🙂
SVS is another animal. For home theater they are fantastic!  The pricing is fair for what you get. But for critical two channel listening I would not look at SVS. Oh and both have great customer service.

Sorry I can’t help you with any other brands.

JD