Sorry for the late post...If you have not already spent the hard earned i can very much recommend the Cremona Auditor with the Mac MA6900. I have been running this combination for some time and personally think it sounds great.
I have recently moved house and have the system in an open plan living room with high ceiling and it still sounds great...detailed but smooth, enough bass, the amp has a valvish sound but with plenty of grunt...perfectly matches the speakers.
I have recently moved house and have the system in an open plan living room with high ceiling and it still sounds great...detailed but smooth, enough bass, the amp has a valvish sound but with plenty of grunt...perfectly matches the speakers.