Glad you got the doghouses finished and am somewhat surprised there isn't more of a sonic change. Looking forward to hearing about the line arrays. There have been a number of line arrays at the Texas show over the years and they tend to be very enjoyable.
The single amp camp is an odd critter. By itself it's rather clean and clear sounding. No, it doesn't have the low end grunt of some other amps but the clear mids and 2nd harmonic magic are rather interesting and pleasant. I've not heard the amp run as monoblocks.
When the crossover got added to the mix the amp camp got really polite. Very, very laid back. It's pretty but not what I want most of the time. Nice for late night listening, though.
The class d amp has a lot more bass but less depth in the sound stage and no 2nd harmonic magic. Needs a tube preamp to shine but it sounds nice with the tubes.
Which amp sounds right? It's a question that's beyond my pay scale ...