Sbank, Interesting comment. I heard the spectral amps driving Avalon Opus speakers and they were WAY too sterile and analytical. Sounds like this characterstic holds across other speakers as well.
Ivanj, interesting comment on the pass stuff. In researching these speakers, pass labs is the amplifier that comes up the most frequently as associated electronics. The comment on bass is pertinent too - the bass I heard come out of the 989s was REALLY powerful. It seemed like overkill to even consider a sub.