I have been living with my Marantz Pm-11S3 for a couple of months. The amp is paired with a Marantz SA-8004 SACD player and a pair of Focal Chorus 836V speakers. Just after buying the amp, I picked up a gently used Focal SW 800 powered subwoofer.
My listening room is not ideal - an L shaped room where the rear wall distance varies. I am also a newbie, having only listened to a handful of speakers and amps, so take my assesment for what it is worth ( perhaps just self assurance that I chose well).
Bottom line - no more purchases for the forseeable future - I have hit my listening nirvana. Everything works together extremely well. I had a concern that my previous amp (PM-8005), while an excellent integrated at its price point,was insufficient to drive the speakers both at very low listening levels and when cranked ( when I have the house to myself). In fact, I did experience some clipping at truly high volumes with the old amp. No more with the PM-11S3. In addition, I feel there is much better resolution when I play at very low volumes.
I also am very happy with the built in headphone amp. I have a pair of Sennheiser HD-700's and listened the other night to a Norah Jones SACD. Both the resolution and soundstage were impeccable. With my much cheaper portable headphone amp, these headphones can seem just the slightest bit shrill at the top end, but with this amp, they are flawless.
Finally, I listen principally to vinyl through a Music Hall MMF 9.1 TT equipped with a Dynavector 10x5 HOMC cartridge. I can only compare the PM-11S3 phono stage to a Musical Surroundings Phenomina II phono preamp. This is a great seperate preamp, but I see no need to bypass the internal phono preamp in the PM-11S3. It is excellent.
I put this system together entirely by buying used on Audiogon. Total cost, including Acoustic Zen Satori cables and Matrix interconnects, was $6,100. ( about $5K over my original budget). I know many spend more than this just for a cd transport, but I am where I want to be.
If you are putting a system together in this budget range, I heartily endorse any of the upper range Marantz products and especially the PM-11S3.