Thiel speaker model range

I have never auditioned CS2.7, but I did that for CS3.7 - when my choice was between CS6 and CS3.7.  I think mid-high ranges are
comparable in both speakers, perhaps CS3.7 give wider and more intensive mid-high ranges, although low frequencies are not comparable - CS3.7s  lack them, whereas CS6s give deep solid natural bass. I do not regret that I have chosen CS6s (the coaxes needed reparation that was done in Thiel by Rob Gillum quite well).

I also own CS3.6s and  MCS1s with Thiel smart sub for more than 10 years  already, which I also like. Before MCS1s I had some time CS1.9 that have decent high frequencies but I think their mid ranges are a bit saturated, nothing to say about low frequencies. Bookshelf MSC1s are uncomparable superior to  CS1.9 s.  

I would not hesitate to choose CS6, although if you have a small room and your amp gives  below 100 watts  then perhaps CS3.7 would be a better choice.  

Thanks, and just one small complement: I had no chance to verify, but I may suggest that the recently rebuilt coaxes sound beter than the originally fabricated ones 15 years ago, as newer made pieces and perhaps somehow upgraded ones were used (I had no chance to audition a pair of CS6  with original coaxes lately)  - or that is not possible? 

And I agree that CS3.7 midrange is really lovely, but I am not sure comparing the overall performance of CS6 and CS3.7. Why you think that CS3.7 are more coherently sounding? This also has much to do with speaker placement and room characteristics which might be more appropriate for one or another type of speaker. 

Both speakers CS6 and CS3.7 have similar skeletons,  a single coax drive, a woofer and a passive radiator.  Perhaps, the coherence has to do something with woofer/low frequencies, the more you have them, less coherent sound the speakers? So one chooses what prefers. I think CS6 give all the sensations a speaker may reproduce, I can precisely feel and hear the way a record is made, how it was recorded, etc. They give open, clean, realistic sound and  I do not feel that there is some real lack in midranges (with CS3.6s a little lack of midranges (and also a bit of high frequencies) is notable though). 

When I will have a chance, I will again try to audition CS3.7s which I think are significant valuable speakers.