I always used cj electronics with my 3.6's and I never thought of the Thiels as being sterile. They always projected a deep wide soundstage and were very musical with copious amounts of timbre around the instruments. The hall mark of cj.
Take a look at the Spectron Musician III SE MK2. It a very musical amp combining the audio quality of tube like (not tube though) mid and highs and SS tighness and richness of bass. It can drive anything down to .1 ohm and has 600 watts@8ohms and 1200 watts@4ohms. I am very happy with mine driving a pair of 803D B&W's.