In defense of Jeff Joseph and his speakers, while I found the format of playing controlled material less to my liking than just playing what folks want to hear (this can be said about most exibits, and is a pet peeve of mine at the 3 shows I've been to), I personally found the Pearl/Manley set-up at Hi-Fi 2002 to definitely be among the best if not the best at the show (the "St James Infirmiry" finale was THE BEST "you are there" demo), Jeff or Eva Marie Manley did not ask for my vote but Jeff did remind folks to vote as he stated above. I would reserve final judgement on the Piega because I just didn't like the 5 channel demo by Sanibel, certainly not because of the speakers which sounded quite seamless for a multi-driver system. Both are nice systems but like Twl, at this price point Sound Labs A-3's would also be on my short list. I thought they were a bit more than 8K though.
With your existing equipment, I would think the Piega would a better match than the Joseph which would benefit greater from tube gear IMO.