You may want to check the Audio Connection website. I think they had at least one of the speakers you're considering used. Having had the 5A's in a room that was 23' X 12', my guess is your room size should be a factor in your decision.
Choice of Vandersteen models
Assume the price for either will be the same. Quatro Wood(not the CT), or the 5 (not the 5a or CT). Both in excellent condition. Don't discuss alternative speakers, other than these two. Which will sound better, which will hold value better. I have Modwright OPPO 105, and NAD 375BEE amp, 150 Watts Per 2 channel.