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 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
pmotz307 posts01-25-2016 9:18am(((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.)))

Pmotz You are thinking of the V2w = Home theater sub