When I owned the Thiels I used Ayre V-1xe, Bryston 7Bsst, Parasound JC-1s. All well rated amps, until I bought the krells I really hadnt heard the Thiels at there best. (at least when compared to the other amps I owned)
I have heard the 3.7 sound wonderful with Hegel amps at RMAF a couple years ago too. If I used Thiels again they would be a second option after Krell.