Keep HE-500 or get HD 6xx or 650?

Do you think the comfort would be a noticeable difference?

Or what do you think about the LCD2 Classic?

The headband from the he5se is more comfortable to my head then the original he5 headband because of the suspension strap, and I believe the cups are lighter as well. I liked the focus pads on the he5se more than the original velour pads on the he500. The he500 is 17.6 ounces where the he5se is 13.7 ounces

The LCD 2 classic is a very pleasant warm wide and bassy sound signature that would be a good upgrade as well. It’s built well and relatively heavy, at 19 ish ounces, but it distributes it’s weight well enough, but I didn’t initially recommend it because of its weight