Hi, I'm a hd650 owner. He sounds great for me, but I would like to change to another one. My main activity is gaming, and movies. I listening music sometimes but less often. I keep my headphones many hours on my head a day. Comfort is very important for me, I have "big ears" (not so much ahah). For example I can't wear a beyerdynamic more than 20 minutes... but if there is sounding like headphones with sennheiser comfort it could be my next ones. So there is some criterias : - comfort (big earcups, like hd 6xx) - ~< 600$ if possible - powerful deep bass (HD 650 does not really lacks but if i could have some more <60hz.. and something <50hz ) - large sound staging (for immersion) - open headphones (I'm not sure but closed ones sounds less natural) Maybe I can just upgrade to HD 700 ? I don't know. Thank you for your advices Maybe a detail, but my soundcard is a Sounbblaster Z (I love SBX studio for gaming and movies), I plan to change it to a X7 because of electromagnetic perturbations in my PC case.