The SS-m7 were truly wonderful speakers. Transformative for me, personally. I had been a vintage speaker collector of things like Advents, KLH, AR, etc and they were on Chicago CL for $200 and nobody knew what they were. I got them home and it took a bit to realize what I had...in fact, I think the next weekend I bought a pair of Dahquist DQ-10s (I was a pro-level hoarder) and it was the comparison between the two, as I'd had little time to listen to the Sony speakers, that really kind of broke me of my habits. I haven't really liked a '70s or '60s speaker since, though I did like those early '80s Cabasses you have, and an early '80s pair of Diatones that I had.
Speaking of those Cabasses...I found the grilles in the move! They're ugly but I'll have to get them over to you (I'm in Detroit right now).