soas
Head-Fier
True, if only we had a Drop in Europe, it would have saved me 130 euro.
But to be honest, I find the combination of grey and black of the HD650 better looking than the blue/black of the HD6xxs
Though I have the HD6XX and quite like the paintjob, I am most partial to the HD660S.
I have pretty sharp eyesight, though I keep the lights low at my desk. Most of the time the midnight blue just looks like black to me.
End of the day, buy which ever variant you like most as they are all excellent. That's my impression, anyway. They have the staying power they do for a reason!