I believe there is a Marantz Reference owners thread on stevehoffman forums... you may want to check this one out.
Marantz PM-10s1 Integrated Amp
Does anyone have any experience with this amp? I have the predecessor PM-11S3 and this is quite a step up in price. I believe it is a Class D typology. There does not appears to be any reviews online. Would love to know more about it than just what Marantz puts out in press releases.