Although I'm in the market for a significant speaker upgrade, I've been using a pair of the original Boston Acoustics A200, Andy Petite's first design after leaving Advent c1981 for nearly that long now. I've upgraded the caps in the crossover, bypassed the fuses, spiked the cabinets, and put in new woofers from BA a couple years ago when the old surrounds wore through. I liked them the first time I heard them and they've definitely stood the test of time for me, despite my electronics having improved a couple orders of magnitude.
I find the frequency balance ideal and the detail resolution to be surprisingly good, enough to discern all cables and electronics upstream. Their HF dispersion is near perfect. The biggest deficit is bass, the 10" acoustic suspension woofer not having nearly the articulation of more modern designs, and the fact they were designed to be against a wall for proper bass extension - much is lost when they're centered in the room. With their wide front baffles they also sound 'boxier' than the narrow-profile current spkrs, though this does make for a very stable soundstage, at least laterally.
In my recent quest for my next speaker, I am amazed how well these compare with anything under $3K. Of course, that makes it all that much harder (or pricier) to find a spkr that significantly improves on these in all areas...