I'm in no hurry. I have about 10 hrs on the stock ones. Just trying to digest all this tube rolling dynamics as I new to the game. Thanks for the info.

Excellent review JoelT. Thank You!

Kent, how long did you have the 650's before upgrading to the 800's?  I just upgraded to the 650's from my very old HD-265's.

Hello,   My name is Frank and I'm a Headphone Addict, or so it's starting to seem like that. Just getting into headphones and wanted to say what a great site this is. It's already helped me in my first tube amp purchase and headphone upgrade