AR VT80SE compated to Ref 75SE amp discussion

I now have a pair of CJ Premiere 12's and also a NAD M23 for summer use

Neither. Buy their latest designs. Most of the tube worries are gone now that they use fuses instead of diodes for protection.

Jimbones,

As a big Quicksilver fan and owner here, I strongly recommend you consider the KT Monos. I have recently purchased a pair, and I can say that they are FANTASTIC sounding amps...musical, engaging, great bass, zero fatigue, and shockingly quiet. I also own Mono 120s and actually feel the KT Monos are every bit as great, plus they have the benefit of being able to use a variety of KT-based tubes. I'm running the stock Chinese 88s, and they simply sound marvelous. The one difference is that the Mono 120s allow for individual tube bias, while the KT Monos require a true matched pair of tubes, as the bias screw sums the bias for both tubes. Not saying AR isn't good, but I'd put my QSs up against them any day of the week.