Hey Cawdor - Wow, in '75 I was listening to my dad's Fisher tube integrated, and tube tuner with Fisher speakers and turntable. That was a great system, and I wish I still had it. It would probably happily stand up to many of today's newer systems...
Before the Ohms, I had a pair of Q-Series Kefs and psb Image floorstanders. The improvement was surprising - there was that big sweet spot and open sound-stage, but what I wasn't expecting was the huge benefit of the higher crossover with the Ohms. The mids are beautiful! I think this is why these speakers are so involving, and what a lot of today's designs lack. Because of the in-home trial (I think it's 120 days) I was able to compare lots of live recordings, and the naturalness of the Ohms was amazing. Many of the recordings were made by me, in very familiar rooms - the Ohms brought me back to those gigs - that's a quick impression that I got from the MicroWalshes. Now I even use them for movies and TV, and they work great with dialogue/SFX...
Thanks for the Audio Critic link, I was looking for that review a long time ago, but it was unavailable. Bound for Sound also has a favorable review, issue #156 - March 2004.