Just moved back to my loft after a remodel and the system is sounding good. The room is 70 feet long and 22 feet wide with a 22 ft high ceiling. It used to be a beer brewery and they converted the place to lofts. Concrete floors and ceiling.
I use the AR LS-10 solid state pre, the Ref 2 mk2 tube pre for a change of pace and then the Pass pre. All three are excellent, just different in their own ways. I can't decide, so I keep all three in a monthly rotation.
Later this year, I'm going to get an Audio Research Reference 3 preamp.
The home theater portion really cooks....I plan to get the top of the line InFocus projector later this year.
Paste this link into your browser to see more photos of the whole room when the Kappa 9's were my main speakers.