I heard thiel cs 3.7 driven by mcintosh mc601 600watts. Not heard of TAD before. For me, Thiel is not impressive at all. It has a flat neutral mid high. It sounded so plain. This speakers need high power solid state amp. I compared it to Tannoy Kensington driven by tube, Avantgarde G2 driven by ARC and even magico s5 driven by soulution and I like Kensington overall.
If you are willing to spend 21k, I would definitely try more speakers.
If you are willing to spend 21k, I would definitely try more speakers.