I agree the MF amp is a bit over the top with power. But in my experience, one can never have too many quality watts and current. Even at low levels, the speakers will sound better with a very powerful, quality amp. And if the OP ever upgrades his speakers down the road, he will already have a tremendous amp. I heard the amp at Don Better Audio in Shaker Heights, Ohio. He only carries very fine audio. ARC, Sonus Faber, Shindo, and Musical Fidelity amongmany others. This amp in question is a dual mono design with speaker outputs for biwiring. It sounds very detailed and smooth, even at the top and bottom ends. It does not strain, nor sound harsh in any way. For a powerful integrated, it's really top notch for the mid to hi-fi end. IMHO
Once again, I am not knocking Marantz. Love their stuff. But my money would be spent on the MF amp, without hesitation.