I suspect I will get pelted for this, but the guy who sold me my GLite + DPS owned an R10 (US version, I believe) and said that combination worked very well together. He also said he preferred the HD-650 to the R10, out any amp, so take it as you will. IIRC, the R10s are pretty low impedance cans, and the GLite has minimal output impedance.
He initially offered to sell me the R10 (for $2500, IIRC) but ultimately ended up selling it to his former girlfriend. I'm not sorry I didn't get the R10, but I wish I'd taken a stab at some of his C-J gear.