A work in progress..but getting there! I have a tough room with floor to ceiling glass on the front wall and one side wall of a 22x20 space. Floors are hardwood over cement slab so my space is very live acoustically with a fair amount of slap echo. To mitigate this I have setup as a somewhat near field listening position with the speakers well away from sidewalls. The revels and sub have made a huge difference in the sound from the B&W 805s I was using.
Agree with Chrissain, on latest Levinson pre/power the Ultima was much drier, shrill to my ears, compared to the Performa 32 which is more relaxed slightly warmer sounding.