Hi Andrew!
Welcome to A/C and the place of many answers...and more questions.
I had questions such as you, and real high efficiency speakers, and in spite of several tubed amps, bought that little "inexpensive" T-amp to play with.
I thought of rebuilding it in new case, but decided to get something with a little more power for my purposes, leaving the T-amp project on hold until I felt like fussing with it.
Well, I've just plain moved on to more with a modified Teac and more tubes.
Have heard the Clari-T and it is definitely a move forward from the stock thing I had. A little searching might reveal some folks that did get ClariT's couldn't leave well enough alone and went for modded ones.
I imagine, that once Vinnie makes his new signature amp available, some of the ClariT owners might be looking to 'unload', if the prospect of 2nd hand appeals to you as much as it does to me. (I just hate that loss of $$ as soon as you drive out of the car-lot!)
Afraid I haven't heard the speakers you refer to, but a little time spent reading here in such places as the Omega and The Horn Shoppe as well as others, might reveal you to some real winners for high efficiency.
Good luck on your path. There are no bad choices, only longer roads.
Best regards,
DeadFish