Thanks auditory, that's what I was looking for. I should have titled my original post to aim at a comparison. I thought the ref 1s sound great for jazz and baroque music, the music I prefer, but not as satisfying for large orchestrations as my ref 107/2s were. But carefully checking out the setup and resetting the crossover to the subs from 40 to 80 Hz changed that. The sound stage is deeper and larger. I think I'll probably pass on the 207/2s.
Someone please talk me out of this
I use KEF Reference 1s supplemented by a pair of Velodyne HGS-15s controlled by a SMS-1 bass manager that provides acoustic room correction. I think the sound is superb even with large orchestrations since I raised the crossover of the subs from 40 to 80 Hz. BUT I think I’ve found a pair of KEF Reference 207/2s for $7200, and I’m very tempted. The preamp is an Ayre KX-5/20, amp VX-5/20, sources Roon via QX-5/20 and discs via DX-5 DSD. I previously used KEF 107/2s that I loved. but I suspect the combination of Ref. 1s and HGS-15s is superior.