well I'm a new owner of the HD600.
I had the HD595 and long story short someone stole them. I've since moved on and enjoy the Denon AH-D7000 but recently was at a head-fi meet and gave the HD 600 a whirl. Very impressive can. I've heard the HD650 before as a friend of mine has them and actually enjoy the 600 more. I enjoyed them so much that it prompted me to start searching for a pair and found a pristine set online with the HD650 cabling for a reasonable price. I just got them and have had them on for about 45 minutes. Awesome can for classical and vocals.
These are meant to be my secondary pair of headphones since IMO nothing shines a candle on the Denon's for bass and I do a lot of modern rock / trance / techno listening but for those days I like to kick back with other genres (vocals / classical) I think these HD600 are fantastic. The HD600 do a decent job in trance area too but it's just not the same.
I like the "blue hue" as well on the headband and these completely blow the HD595 out of the water IMO. Lastly, where's this veil? I'm a former Grado guy and why I went with the 595 my first go around.
EDIT: Here's a photo of them...got all originally packaging and case.
Edited by N0sferatu - 7/2/11 at 10:44am