What is the best amp for Sonus Faber Cremonas?


I currently am driving the Cremonas with a Mac MC402. I find the Mac amp to be too dark with too much bass. (The speakers are well positioned out into the room.) I recently auditioned an Accuphase A-30 class A amp compared to a pair of Mac MC501's with Wilson Sophias and thought the Accuphase was far more musical and detailed. I never would have thought a 30 watt amp into 8 ohm (60 watts into 4 ohms) would be so effective. I am concerned about using this amp in my room which is 25' x 20'. My speakers have an impedence of 4 ohm with a sensitivity of 90db. I am using a the Mac C2200 tube preamp, but I would be willing to switch it out as well.
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I disagree my sonus faber cremona speakers sound fantastic with my Mcintosh C220 pre amp, MC252 power amp and MVP861 cd player. The sound is fantastic. Maybe you have a problem with your room ? Are your speakers near the corners or is the listening chair back against the wall ?
I heard the Cremonas powered by the Ayre V-5xe at the Festival Son & Image in Montreal last year, and the sound was fabulous, among the best rooms at the show.