@tmsrdg, re: Spectral and Thiel, the specs you posted are a bit off for both brands. Both brands are a bit better than posted. From a technical standpoint though not quite absolutely ideal they should be an appropriate, adequate combination so long as one doesn’t play too loud and/or play in too large a room. When I lived in NYC my most often used dealer carried both lines. They frequently paired them with various Thiel models. Interestingly, they never seemed to be paired for long durations. I have not heard the combinations with more modern Thiel’s. I’m not quite sure but perhaps the CS 2.3’s were the last models I’ve heard them paired with. From a technical standpoint the more recent Thiel’s are a bit more challenging for the Spectral’s than the legacy Thiel’s, but still appropriate. Sonically, I can imagine models like the CS 3.7’s perhaps being a bit better fit than the legacy Thiel’s. But, that’s just speculative.
FWIW, IMHO, While I have true respect for the Spectral gear, I never much cared for them. To my ears, while fast and clean and pure, they sounded somewhat white and bleached. Spectral was a long time Absolute Sound editor’s choice favorite; Stephen Hill used Thiel 3.5’s with a Spectral DMA-50 amp (Threshold pre and Straightwire Maestro cables) for mastering the "the absolute sound HEARTS of SPACE" recording. And they did work rather well in the famous Avalon, MIT "2C3D" systems that were deservedly quite famous. (FYI, I’m not a fan of MIT cabling with Thiel’s either. YMMV!) The somewhat unique technical characteristics make system matching somewhat more limiting than most, and I would recommend making inquires into parts and service availabilities before purchase.
Not my first choice, but I can certainly imagine others enjoying the combinations.
