I've got the VR-4 GEN III SEs and have tried a number of amps with them, including the Spectron MIII and JC-1s mentioned above. As Dan stated it comes down to personal preference. I had trouble relaxing with the Spectron MIII. It is very detailed, almost artificially so to my ears. The JC-1s on the other hand was more natural and relaxed sounding, and threw a larger soundstage. They also have seemingly limitless reserves of power with the VR-4s. I have since switched to tubes and currently drive my VR-4s with a CJ PR140. It does not have the slam of the MIII or JC-1s, but it does have a well controlled and tight bottom end. Vocals and intruments with the CJ just sound more life like to me, and as a result I feel more involved in the music. In the end there is no substitute for listening to these amps in your own system. But if you have the room the JC-1s would be worth a try if tubes are not a consideration.
