I am using a Bryston 4B-ST with my Vandy 3A Sig's and pair of 2Wq subs, and I'm one mighty happy, yet frugal, camper. The Vandy's respond very well to an amp that provides tight bass and relatively high current. If you have a very large room, or listen at very high volume level, you might want to consider Bryston's newest amp, the 14B-ST, which has gotten terrific critical reviews.
You might also audition the Ayre amp -- my local Vandy dealer uses the Ayre to drive his demo Vandy's (3A Sig's, and Model 5's), and it's a fine combination.
You might also audition the Ayre amp -- my local Vandy dealer uses the Ayre to drive his demo Vandy's (3A Sig's, and Model 5's), and it's a fine combination.