New to the site. Grateful for the many comments. Running a pair of M3TM's (in M1 chassis). Driving with Bel Canto 3.7 DAC and Ref 600's. Started with M1's, then upgraded to the "better" dipole, then upgraded to the TM iteration. Originally amping with the BIG Psvane 845's (utterly amazing 50 watt 845 amps). But with original M1 configuration, upper frequencies MIA. Clayton suggested moving to SS. This was heresy to a tube guy for the last 35 years. While looking for SS gear to buy, I figured I'd try something light/cheap b/c the Psvane's just weren't "doing it." Started with Musical Fidelity M1's (class D - $999 - 100 watts). Thought I'd be underwhelmed, bored and disappointed. WRONG. I was actually astonished at the presentation. Because the Psvane's weigh 100 lbs./each, I wondered, before upgrading the Spatials, if moving up the class D line might further improve the presentation. Bought a pair of Auralik Meraks. Really fine sounding amps. More bloom, tonal density and far better upper frequency presence. In the meantime, I had the Spatials upgraded to where they are now the TM's. All the while I was communicating with Clayton who was helpful and understanding of the issues. In fact, I suspect that my early conversations with Clayton may have contributed to his decision to design the TM's inasmuch as we discussed my concerns over the lack of upper frequency detail when using tubes. The Ref 600's sound so open, natural, and "right" that I'm wondering if I'll go back to tubes in this downstairs system. I agree with the comments re: the dipole "tweeter" is a slightly more relaxed and slightly more refined driver when compared to the M27(?). I never listen LOUD so it's possible that even after 150 hours or so, listening at no louder than 85dB, there is some break-in still required. As I'm writing, listening to Illinois Jacquet "Birthday Party" and wondering if it's worth it to spend $1,000's more to buy the X2 (although I admit the tweeter in the X2 is more likely to provide the detail/texture that this M35 driver seems unable to provide). Bottom line: I don't see myself returning to cones/domes in a box. As I've aged I find the OB relaxed/open presentation preferable to boxes. For those who haven't tried class D, remember that's how Clayton had been showing his products. And, again, this endorsement coming for a tubophile for over 3 decades. Who woulda' thought. Grateful to have been able to read your messages and consider your thoughts. Take care all.