Thanks, but I had the 650 for 3 years. Nice phone, but ultimately just too thick and rolled off for me. I'm enjoying my DT880 Pro and consider it superior (for classical).
Ah, electrostatics! I had various Stax models through the 70s and 80s. Rather bright, sometimes creak, and seem to take forever to energise (maybe I'm impatient). Would be interesting to hear an alternative brand, though I'm pretty sure I'd never buy them. I'll do a bit of Googling.
try beyerdynamic T1 then