@77jovian
“I like the Treos, but I have really fond memories of Thiel 2 2's that I had years ago. ”
I am using an Ayre AX-5 Twenty to drive my heavily modded CS 2.4 (albeit, total resistance is on par with OEM). The CS 2 2 looks to be an easier load. With my combo of amp and source (Ayre QB-9 Twenty), clipping sets in just shy of 100 dB on the 2.4. That’s more than loud enough for my tastes. YMMV, and unsure how the difference in sensitivity translates.
Curious what is missing with your Treos. I absolute love my hot-rodded 2.4s (almost certainly my last ever speakers). But if I were buying new, the Treo CT would certainly be on my very short list.