I have a pair of 3.5R and am running them with VTL MB750. I tried Bryston 7B, Audio Research VT100, Atma Sphere MA2 Mk2, Levinson 332, Cary 805C and the VTL's. From what I heard, the VTL smoked the others. Having said that, the price was 2x as well. I really liked the 805C, but you will miss the bass. I was constantly adjusting the feedback, more and the bass was better, none and the midrange was better than any of the above. In solid state the Brystons are a strong choice...spend the rest of the money on a tube preamp. But if you want the best these speakers can do VTL is a good choice. As a side note, I did not compare Classe, Pass, or BAT these may be great too.