Vandersteen 2w or 2wq's


I have a nice pair of Vandersteen 3a sigs and was thinking about adding subwoofers.
Audiogon has listings for a pair of 2w's. My question is:
What differences are there between the 2w and 2wq's(besides the variable q) sound wise?
Should I be concerned about buying an old subwoofer-does anything wear out and need replacing?
Thanks Bob
gdnrbob
the Q IF you can put filter between pre and amp or if your integrated as this feature.
spend some quality time at Vandersteen website
the FAQ section under support
The line level preserves amp transfer function and will result in better sound.
I had 3 A sig for many many years...
Personally I would flip them for a pair of used Model 5... there you get the better filters, much more capable subs, 11 band EQ, etc..
But I also understand the appeal of a $500 sub
l

The 2Ws are pretty long in the tooth now.  Certain s/ns have had the amp upgraded. Check w RV. 
The 2W offers a somewhat "looser" sound which is intended more for the home theater crowd.  The 2Wq is more intended for use in a music system, the variable "q" allowing you to adjust the bass to your liking and more importantly, to the music.
Thanks for all the responses.
I just got the Vandy 3 a sigs, so I don't think I will be upgrading my speakers anytime soon.
lI currently have separate amp and preamps(All McCormack). So, installing the crossover shouldn't be a problem.
I will leave a message with Vandersteen. (I was surprised last week that he personally called me back, though he does seem a bit brusque).
gdnrbob
(((I will leave a message with Vandersteen. (I was surprised last week that he personally called me back, though he does seem a bit brusque).))

 I would strongly suggest you read the well written owners manual first before you ask RV a question that was already in the manual or feel free to shoot it to me
if its soothing you are not sure on.
          Best JohnnyR
 Vandersteen dealer