1)What type of music do you mostly listen to, and 2)What do you find are the most appealing characteristics that you find lacking in more traditional lower efficient, high power amplifier-based system1.) Jazz, Blues, Rock, Bluegrass/Folk,Classical, New Age in that order.
2.) Coherence, micro-dynamic expression, transparency, tonal density (harmonic resolution), and macrodynamic resolution (congestion/compression during more complicated music).
Bottom line for me is that the high efficiency crossoverless speakers I've changed to sound more real to me and are far far far more emotionally engaging. Sounds like you have a good amp to mate with one.