I have mine before Christmas. I think I have an average size head. The setting on mine is 5 as well. What I find is that, the cup stay on your head by frictional force between the padding material and your skin more than relying on clamping force. The top of the headband barely touches the top of my head. It is super comfortable compared to my other headphone. Usually, after wearing it for a few seconds, moisture prespired from the skin generate enough friction to allow for some not too rigorous activity while wearing the headphone. The high friction in the gimbal adjustment allows me to adjust the clamping pressure on any section around the cup and stay that way. Which is not possible on a free pivoting headphone.
When I used mine with an E17. The improvement is very noticeable. The bass is more potent. When I connect the E17 to the optical out from the TV with the bass set at 6. While playing back the 'The Dark Knght Rises', whenever the bass hits, I can feel it from my skull thru my shoulder down to the spine. Don't get me wrong, it is not the loudness, it is about the impact you can feel out of these cans. Not to mention the clarity and separation between sounds.
The long cable actually is a bonus. I coiled the extra cable and tuck it underneath the E17 with the nice thick rubber band supplied with the E17. If I need a longer cable, I just release a few coils. Also, I formed a loop on the connector end such that I won't over-stress the connection between the connector and the cable.