May I chime in with pairing that has worked well for me? My Thiel 3.6 set is driven by a modified McCormack DNA 1 with Kimber Monocle XL cable. Last year, I replaced my ARC LS 9 with the an ARC Reference 3. I purchased all of my gear used a piece at time over many years which is the only way I could come close to affording any of it. Don Hoatson (since passed, RIP) of the Listening Room in Baltimore always suggest that Thiels are well served by running a SS amp (Classe, Pass Labs, McCormack are reasonable choices purchased used) and a tube preamp to add a touch of warmth and sweetness. Don may have heard this from Kathy Gornik. I was never sure that this was not just sales hype, but now, finally, I know better. The rubric of using Thiel+SS amp+tube pre=joy is real from my experience. The upgrade for me of the LS9 to Ref 3 was pure magic with Thiels. Heard much on recording that I have never heard before with a wonderful spatial
context and refinement.