I don't know about "best", but I have heard them with the ARC Ref 2, and VTM200s and they sound incredible. As stated above, these speakers are relatively easy to drive. I am using a VT 100 MKIII, and it does an excellent job. However, if you listen to complex music at high SPLs, the VTMs are more immediate and intense.
Best monoblock tubes amp with Vandersteen 5As
What is the best sounding monoblock amp for the Vandersteen 5A's at moderate listening levels in a 12 x 25 foot room with 9 ft ceilings, hardwood floor? I have heard them with Cary and Quicksilvers. The Quicksilver V4 sounded very good but what else will sound even better???