Yes, I know you're not supposed to mix with headphones, BUT 1.) I did a some damage to my hearing back in the 70's and 80's, 2.) I'm getting old, 3.) I only have KRK Rokit6 monitors, and 4.) I have a much better time of hearing instrument placement in a mix with headphones that you younger and/or undamaged audiophiles can hear with speakers. When I watch tutorial videos and they make changes to settings I typically can't hear the difference, except with headphones. My bass reflex Rokits give a falsely good bass response that doesn't replicate well to other systems so I have to compensate for that.
Anyway, since time marches on and I'm not getting any younger, nor do I ever expect this to anything more than a hobby, I've decided to break this rule and get a nice pair of headphones.
I'm looking at the Sennheiser HD650. Sweetwater has them for $500. Sony MDR-7520 for $400. Shure SRH1840 for $700. Would anyone care to comment either from experience with these sets, or make other recommendations.
Thank you in advance.