I’ve had my Soundlab M1’s since 2016. It’s an older pair made in 2006 - I had them rebuilt with the PX membrane, they retain the 90 degree curve.
After I got them back I also replaced the high frequency transformer with the third party AU90 transformer - this really improved the sensitivity.
The current production speakers have the toroid II, a 45 degree panel and of course PX film and the new bass focus design - so quite different from my speakers.
Given where I am with my system, the speakers are the strongest link, Changes I make elsewhere for the positive are always clear (negative as well!). I still have plenty of room to grow with my amps and analogue front end and the Sound Lab M1’s will let me hear everything I’ve done.
I’m extreme happy with the M1’s and the sound I’m getting in the system currently - from both the audiophile and non-audiophile halves of my brain, if you know what I mean.
I haven’t heard the bigger speakers, but a good friend has the U1. His system is spectacular on every level.
Thanks for the comments on my turntable - I’ve been happy with the technics - it’s old school, not at all sexy but does a great job with the SME 312s - I’m currently using a London Reference cartridge which is a step up from the MSL GL, at least in my room.
Cheers
Andy