I am running a BAT VK75SE. It can deliver some real magic with the VR4 JR. Previously, I was using a hybrid amp, an Anthem Amp 2SE (tube 1st stage and solid state power). The Anthem was also capable of delivering "magic" with rhythm and texture. The BAT was a step up in coherence and midrange, but didn't give up much in the way of bass slam.
These speaker seem to be able to use whatever quality you can deliver from the electronics.
These speaker seem to be able to use whatever quality you can deliver from the electronics.