+1 ... I hate to say it, but I am in this camp now, as well. I am using my HD-650s less and less, though they are still the king for vocals and warm/classic guitar rock.
Same here. I check the 650's now and then but don't stick with them any more. Recently tried the Oppo PM-1's in my system and prefer the 700's quite a bit. I have to admit though that I just got a pair of Grado PS500e's that are sounding fantastic.