Something about Thiel CS 3.7

Hello Guys,
I own since ten years the Thiel CS 2.4 (not SE) and I'm still happy with them but someone offered me the Thiel CS 3.7 as change with some added money.
Theorically should be an improvment respect my 2.4 expecially regarding the easyest load .. my 2.4 run with Primare A32 solid state amp.. that does a good job on them.
The 3.7 reading specs has 90db efficiency and 4 ohm load with a minimum around 2.3ohm while my 2.4 87db same 4 ohm load but a deep around 1.2 ohm .. not easy for amps.
Someone here tried both? .. and what do you think about?
Thanks in advance for your reply!
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@dweller Yes indeed:

And agreed, posting in the Thiel owner's thread will get you a wealth of information:
I own the 2.4 and have also had them a long time. I demoed the 3.7 a number of times. The 3.7 is in a another league. It is an amazing speaker. Today it would cost $18k or more if it were still out. 

It will do everything your 2.4 does only better. They are cut from the same cloth so it will be evolutionary rather than different. I would take that upgrade in a heartbeat. I don’t know your amp but I heard them on a musical fidelity A5 (“cheap” integrated) and it blew my mind. I am more jaded these days as I have been exposed to a lot more stuff.  

Thiel 3.7’s great speakers, when driven to get their best. Very low impedance, need an amp that does current real well as Stereophile says. " mandating use of an amplifier that has no problem delivering high currents".

But my god are they ugly as sin, remind me of Daleks in Dr Who.

Cheers George

I concur with james633. Feel free to join us over on the Thiel Owner thread.  You find find several CS 2.4 and CS 3.7 owners on The Panel.

Happy Listening!
Look at my Virtual System photos to see a 3.7 in a small room. It sounds perfect but I had to use DSP via Convolution files and also acoustic panels. Well worth the effort for me.

I even replaced both COAX drivers with and new ones. The bass drivers were recently replaced by the prior owner. Very easy to do this and this was the first time I ever did anything like that. So I feel like I have a brand new speaker.

A former Thiel service tech has all the old Thiel parts and is an amazing help in getting the Thiels to work perfectly.