I use a pair of M300s for my VSA VR-4JRs, placed near my speakers with Speltz anti-cables suspended in the air for one meter runs. I love them. They are the best amps I have yet tried. The S300 is a single box version of the M300s. I hear the Ref 1000s may be even better, but in my room 1000 W/ch was not needed. My amps completely disappear. They are as close to a "wire with gain" as I have yet heard. Although I currently use a SS pre-pro I am looking for a tube pre-amp. This may be a perfect combination and is what the reviewers have used and recommend in their systems. As with all components, they will be system dependent. With the VR-4JRs, it is like someone is standing in the room performing, they are that real. Walter at Underwood HiFi has great prices on electronics, especially Bel Canto.
