Thanks for the reply...so the hd650's will provide me the comfort I need even for long listening times? Am also looking at the akg 702's.
Impressions of some of my cans (yes I know I am sick, this is only a partial listing):
Senn 580/600/650's are comfy on my head, although I did have to stretch them out a bit so they didn't clamp so hard. I put them over the arm of an overstuffed chair for a few days, loosened them right up. Open cans, so lots of airflow, no sweating.
Senn 800's are quite comfy, I think. Very lightweight and nice pads. VERY open design, so ears stay cool.
Ultrasone ED9's are comfy on my head as are the ED8's (wearing a set right now). Closed phones, but have hella nice sheep skin ear pads. Slight sweating if the room is warm.
K702's are OK, I can't wear them quite as long as the others though, they irritate the upper part of my ear after a while. Open design, cool ears.
The Grado GS1000's and PS1000's are OK, however, I'm not sure I would call them comfy. The JMoney head band helps a lot. The ear pads are a little hard. And, they have a weird smell the first few weeks. The PS1000's sure sound mighty fine, though. Open design, but the foam tends to make me sweat in a warm room.
However, the most comfortable phones (to me) are them Denon D2000's/D5000's/D7000's with the Jmoney leather ear pads. Junk the stock "pleather" ear pads and be in heaven, comfort wise, at least for me. However, I have a big noggin, so others with a smaller head may have fit problems. These are closed cans and the stock ear pads will encourage one to sweat in a warm room. The JMoney pads help, but the ears will get warm after a while in a warm room.
Beyer DT990. Nice open design, very comfy with the stock velour pads. JMoney has a leather ear pad upgrade that makes them sounds better, but it does up the "heat" quotient a bit.
OK, I have more, but I'll stop there.
Peace,
Lee