Congratulations! Nice choice on the Eletech Socrates. I'm using the DUNU Blanche.
I think the excellent synergy may come down to the sheer amount of power (at 37/100 volume) the R8 delivers in normal mode, I haven't tried turbo yet (I've been listening to 2 hours of jazz so far). It seems the Luna is given that extra push and adds more dynamics. It's hard to describe. There's less laid back character, the mid bass and treble have more energy to them, it's like the Luna is excited to play back music for you. The DMP Z1 is very even, smooth and the most refined, which is why I suspect the Stellia and Z1R are the best parings I've heard for the DMP. The R8 with the Luna and Odin (turbo) is more exciting like a shot of espresso was added to the music.
I'll need to compare DMP and R8 with different genres, but so far jazz may be better on R8 due to that extra energy. This may not be true with classical, we'll see...