Hi! I use a Classe ca301 with my Thiel CS6's and find it to be a good combination. I do use a Joule Electra tube pre-amp with mind and the highs are very nice in my opinion. I have heard nothing but good news on your Sim amplifier and would be surprised if that causes you any concern.One thing that made a smooth difference in my system was when I purchased some MIT speaker wire and interconnects.I like to spend my money on speakers rather than wire but when I finally tried the MIT it was worth it.Funny though, I do not like this wire when using my Aerial 8's instead of the Thiels.I have been a long time Thiel owner and as your last letter stated,I think you will find the sound grows on you!
Sometimes, you just never know!
Sometimes, you just never know!