After a good couple days of listening, I will say that the Cambridge 840a + Quad 22L's + Nate's speaker cables make me happy to be alive. Just gorgeous, beautiful sound that brings out all kinds of emotions in me. Yes I have even danced a little bit here and there.
Speaker placement is oh so crucial. I have them about 7.25in off the wall, any closer and the bass gets boomy and unpleasant. They might could stand to be even further off the while, but for right now I'm enjoying them. Per the 22L's manual, I have them angled just slightly inward toward my listening chair. However, not all my measurements are ideal. The speakers are a scant 3ft apart from each other, whereas the manual suggests seven. But for now, in my situation, its the best I can do. Maybe someday I'll move them to the spare room where I dream of one day building a pure listening room, but for the time being they stay here, crammed in the small office-ette off of my bedroom.
The speakers excel at jazz, classical, and the Grateful Dead. They do well with rock, certainly, but the sound is so balanced across the spectrum that I'm sure a "livelier" speaker could be more involving. But I've had no trouble getting into Genesis, King Crimson, and other proggy affairs.
I'm so impressed with the build quality of the 840a that I'm looking closer at the 840c to replace the Aqvox for my computer-as-source/redbook needs.