Hi Chris,
I have the Marantz PM11S1 matched up to the PSB Sync One and it is a match made in heaven.
I have many envious friends with this combination as they have spent as much money if not more and not achieved such a good over all musicallity.

As John A said in his review the PSB Sync One suits warmer sounding amps which the marantz is.
I assume the SM11S1 is the the amplifer version of my integrated.

I think the NAD M2 is a cooler sounding amp as it is based on class D technology.

Cheers
Blair

an integrated amplifier and does not require a preamp. It is a blend of circuitry from the SC-9S1 preamplifier and MA-9S1
monoblock power amplifier. Perhaps you will want to look at it instead of the SM-11S1. Or the newer PM-11S2. The NAD is certainly more powerful, but as Blair has said he thinks the pairing of the Marantz with those speakers is very good.

@CHRISinMTL

I have heard the NAD M2 Direct Digital Amplifier and The Synchrony One Loudspeakers, and they are a great combo. The M2 Does need good recordings / source material though.