Thiel 3.7 with tube amps and room size

Your room is fairly large but not HUGE. Are you concerned about the Carvers' ability to adequately drive the Thiels? I use the the Carver BB 305's in my 17.5x26x9 room to drive Magnepan 20.7's and the amps do not break a sweat no matter how loudly I play music... Exceptional tube amps that I think can drive most any load.

Before getting the 305's I was using big 500 watt Cary SS amps and they could not touch the Carvers in overall power, dynamics, and just plain musicality. The 500 watt SS amps strained, the 305's just cruise along...

OP-

the Carver amps is plenty to drive those 3.7 loudspeakers.
If my room was large enough, I would not hesitate buying the model 3.7 - since my room is smaller I will opt for the 2.4 or 2.7 model.

For a reference, the 3.7 is designed for room(s) that are large, 20x20, 25x25, 30x30...etc.
Keep us posted and Happy Listening!