Hello @ghdprentice !
Thank you so much. I really appreciate your comment as you've owned the Berkeley. The CD9SE... WOW! I really adore AR stuff. The some of best amps I've heard (save the Boulder 2160) have been AR.
Thank you for your kind words. My wife doesn't like carpet, however, when I have a serious listening session, I do put down two thick blankets on the floor. It's an interesting idea you had about putting absorption in front of the fireplace. I have a bit of a fuzzy center image because of it and I never considered movable panels.
I have 4 5" thick Vicoustic panels on the walls behind the DAW's. They make a minor difference as-is, but I wonder if they were on a discrete stand with casters that I rolled out (like the blankets on the floor) if that would help... Very astute observation and thank you for the advice.