@gbmcleod What I was attempting to articulate was not excoriation of the 3.7s. They are a speaker that excels in midrange timbre, clarity, and staging. What I was attempting to articulate is that it is my opinion that the 3.7 is limiting the potential of Lamm/AR combination, especially in the areas of imaging, secondary harmonic decay, ambient decay, bass & treble extension, and micro/macro dynamics where the dynamic speakers listed by the OP will better realize the potential of the Lamm/AR combination, as well as the OP’s astonishing front end electronics.
Please do not be offended. I love the 3.7s. I had Apogees for years. Their strengths and faults similar to the 3.7s. However, when I moved on to modern dynamic speakers. You can look at it another way, even though cost and sound quality are not always directly proportional. If my memory serves me, the Lamm/AR combination is $60k. The 3.7i around $10k. Not following my rule of thumb … approximately 40% speakers, 25% amplification, 25% front end electronics, 10% cables. The speakers the OP is looking at are all over $40k. As I said, SQ not always directly proportional to cost, but + $30k over the 3.7i just buys more performance.