Hi Sanji,
I have wilson sophias 3 too which I partnered with Krell 600c amp, my preamp is sonic frontiers line 3.
I am also a tube fun and believe to have always a one tubed equipment in the chain. Since that I was happy with my setup my dealer offered me cary 805 AE and also I wonder if going on 845 or 201 tube direction is worthwile, because I felt that there were more potentials on sophias to be extracted. I appreciate if you describe more how your cary's are driven sophias, do you have any bass problems. Since that I understand you are already happy with your setup. I usually see cary 805 users are partnering their SET with more efficient speakers..Thanks