Subwoofer for classical music listener

So, rvpiano, are you going to get some Vandy 2wq's?

Yes!
Thanks to your recommendation and one other that was glowing, and a price I couldn't refuse, I bought a used one on Audiogon.
The only problem now is to find a crossover that matches the impedance of my amplifier.  I suppose I can use the sub just the way it is now without any damage.
I wrote to Vandersteen about obtaining one.

((Is there any reason not to go with the Vandersteen 2Wq!?
Anyone else have an opinion?))

 absolutely great choice!
 rvpiano start with using the supplied assessment box and read the well written manual.
 This will assure your investment is safe.
 The manual will explain how you experiment with the various settings that
 work with your amps specific input impedance.
 The most important thing to realize some amps like rotel and bryston
 you may need to go lower in the settings then usual to get the right amount of bass.
A pair of these will improve your in room bass response while also allowing your main amp to benefit from doing any heavy lifting.
 when its all set correctly leveled and spiked your whole system dramatically performs better and on a more engaging level.
 Let us know how your doing
     Enjoy
 Best JohnnyR
 Vandersteen dealer

There have been many advancements in subwoofer design, amplification, and control, since 2008. 

More helpful would be to describe the brands and models of your receiver, integrated amplifier, or preamplifier, your main speakers, and your listening rooms approximate size.

If you've been reading up you may have learned that two subs can provide a much better room interaction which may determine affect your budget.

The majority of powered subwoofer offer basic rear mounted controls for gain, crossover point, and fixed or variable phase adjustment which date back long before 2008.   

There is a brand that includes four small subs that's said to offer very good room interaction. A few models include a microphone to preform automatic room correction and some will also preform automatic and/or manual equalization and show the in room effects via a laptop or TV monitor. Others offer remote controls that allow you to adjust the subwoofer volume or select from preset or manually adjusted equalization presets for up to six different settings from your listening position.

In the past many music lovers didn't take to what the subwoofers with the basic controls added to their systems presentation. Many of those same people now employ subwoofers with room correction and/or equalization because they can hear how it can smooth out the response between the main speakers and its interaction with the room whether its rap or classical. Read on.