Jonchew-
as a THiel lover myself, you will want the power amp, that also, has high-current to drive them properly.
A tubed power amp, will be another matter. Over the years, I have had the pleasure of auditioning ARC, Ayre, Aesthetix, Bryston, Classe' and Pass Labs (currenrly the best SS at this time). Do not forget older solid-state power amps like Parasound and Threshold.
Lately, Conrad Johnson owners state that these components are a sonic match for Thiel as well.
As anyone can read, there are many, many power amps that will drive those speakers to Audio nirvana. Keep me posted & Happy Listening! JA