Availibility of 3700 is low or non-existent here in Finland. I wonder when it will get better. Same situation for other European countries?
I asked from Denon support about the DAC change about a week ago. Still waiting response. Maybe I'll never get that.
I think you may have better luck asking Marantz support instead, that's based on my own experience. If Marantz support don't have the answer, you can push them a little, politely, such as by asking them to try and get an answer for you from engineering, Japan or something and they might accommodate your request.
If and when you do try Marantz support, you should ask the same question for both the SR6015 and the SR7015 (just in case D+M
might have started to put the lower model DAC (rumored to be the PCM5102S in the X3700H/SR6015 and have a better one such as comparable ES9006 in the higher models). Please also make it clear that your question is about the units made with the replacement DACs that the Japan website mentioned.