Subwoofer for classical music listener


This is my second post on the subject of subwoofers.
My first post wasn't specific enough.
I listen to classical music 90% of the time.
Are there any classical music listeners out there who have subwoofers?
if there are, could you let me know what you have?
i don't imagine I would need quite as powerful or expensive a sub as those who mainly listen to other types of music, but I may be wrong.

128x128rvpiano
Stfoth. Thanks for the encouragement !

I did a long time ago own a Carver Sunfire sub with a small good quality tube amplifier (can't remember the name -- very sweet sounding). 
Problem was a big hole in the middle of the sonic spectrum. Lows were there, highs were there; lower midrange missing.
So, until now was wary of getting a sub.
We'll see what transpires.
Thank you, guys, for your insights! I shall invite my local dealer for a listen (the perk of living in Malibu is that folks do not mind the drive!). 
My sub is tuned up onto the "invisible" level so that my primary listening to Richter and Schubert quartets wont get muddied. SBLs are pretty fast (someone called them Ferraris of loudspeakers?) but when it comes to pipe organ, they fold!!! 
Looking for a new house with a dedicated den, and an old bachelor uncle! ;-(

I'm glad your encouraged  I just want you to realize 
when you hook up
your amps low input imp and the subs in RCA parallel  w your tube Pre amp it will see a very low imp load 
 Lifeless may be the result
best JohnnyR