I'm powering them with two Bryston amps. A 4B-ST (300 Wpc) for the VR-M90s (L & R), and a 9B-SST (160 Wpc) for the center (VR-MC), left & right surround (VR-M 50s), and back surround (VR-M EX). I have the center channel bi-amped.
On the VR-M 90s, the highs seem to me to have good clarity without harshness, the lows are surprisingly good and tight down to around 50 Hz or so. Imaging is very good, but probably not as good as, say, a pair of Sonus Faber Amati Homage. I'm still working on positioning them, though, so I still hope to improve that. Although they are expensive ($2700/pair), they sound very close to some of the much more expensive speakers I've listened to. The VR-M 50s are better sounding to me than my 30-year-old KLH 5's (if that means anything to you), which is quite surprising given their small size.
Given whatever I and others say, however, you really need to find someplace to listen to them. Your own ears will decide.