Thanks, all, for the thoughtful responses. To answer pindac, I am looking for 1) more immediacy and a bit more dynamic response of the various instruments and if possible, pushing the soundstage more forward (didn't mention that before). I realize that the source recording has a lot to do with what is reproduced and a bad recording isn't going to be transformed into a life changing audio experience by the system, no matter what the quality of the equipment is.
I currently have 2 sets of amps and line stag preamps, so I can sell one of the sets for maybe $3k for a purchase. It seems, though, that the resale value is always lower than what I hope for.
I also am wondering if I should look at other speakers, particularly open baffle designs. The drawbacks of diving back into the speaker arena to me are 1) selling the Acoustats because of their size and vintage, and 2) the gazillion choices that I can read about but not audition.