The HE-500 benefits by adding extra padding to the headband. I own the HD650 and its comfort is far better than the HE-500.
Having said that, its comfort does become less of an issue as you spend time with it. It sounds NOTHING like the HD650 unless it's underpowered, IMHO. Since the HD650 and HD600 are said to be so similar, I'm tempted to think that you may be under-powering it.
So true. This is the only way I fly.
Eke, Thanks for the objective review. It's good to read a review with a variety of music where one headphone may excel against the other on one title, then take a step back when the next track gets played. All too often, we see comments get posted here on the forum like "Man, my new XYZ just smashed the boogers out of the old DEF that it was replacing." When those comments are made, I don't learn much from them. As to pitting the HD-600 against the HE-500, I guess it can be a somewhat fair fight, given how both headphones are relatively popular.
In my case, I have the HE-5LE as well as the HD-600. As much as I like the HE-5LE, I then put on my HD-600s and am amazed each time that I listen to them. The conclusion? Well, both are staying in my collection and neither will be leaving. And, for good measure, the HE-500 will be joining the ranks of the other two a bit later this week. I'll then swear that this is the end ... honestly.