Thiel Owners

I use a Modwright LS36.5 DM tube preamp and an EVS 1200 Amp (discussed here -  https://forum.audiogon.com/discussions/life-with-ric-schultz-2200-highly-tweaked-evs-1200-class-d-icepower-d) with my 3.7s

yabe1951
Good to see you gain. Yes, the Kimber Kable Monocle XL is suggested by Taylor of Goldprint Audio in NC. He was a Thiel Audio dealer and remains a Kimber dealer to date.
Happy Listening!

audiojan
Good to see you here.  Several reviewers of the Audio press still list the Cardas Golden Reference as an interconnect preference.
Most will concur about the Clear/ Beyond being much better speaker cables.

Happy Listening!

yabe1951
I will second the ARC Ref3 pre-amp. I, too, had the pleasure of meeting Don Hoatson (R.I.P.) of The Listening Room back in 2012. A very fine Gentleman of Audio.

I found the sound quality of his rooms outstanding from a minimalist approach. Entry level Straightwire cabling and hardly any room treatment(s).  At that time his space was in a medical plaza.
Happy Listening!

sdl4
Second - going with separates, choose a tubed pre-amp and solid state power amp.  Aesthetix, ARC, B.A.T., Conrad Johnson and ModWright are the front-runners for consideration.  Have fun!
Happy Listening!