Aesthetics have some importance... maybe not as much as comfort but I'd rather have both. This is where Stax, k1000, Jecklin Floats all fail. There is something to be said for dignity (even if nobody see's you wearing them, there is self-respect) and not looking like a *victim* of audiophilia ( people who to ANY ends to get a sound which is incrementally better at the sacrifice of practicality and aesthetics). The HE-5 looks good and from the reports sounds great... and also people have not complained about comfort.
Don't mean to disagree w/ someone who is far more knowledgeable than me but that is just my opinion, sorry
You can have both, but looks always come down to individual preference. And there will be designs that some people think are ugly and others think are fine. The K1000 is a case in point. It has a very very well designed headband and coupling mechanism for the drivers. One which should be the basis of a new design for the TakeT H2, which has a dreadful headband design. Certianly the worst of any headphone of its price. I happen to think the K1000 looks nice too.
The best headband design imho is the one on the stax 4070, which is derived from the fixed-arc design of the O2. It's very handsome and mechanically ingenious. Completely self adjusting.
Jecklin Floats don't have a headband in the standard sense, but the design was altered a little for the Ergo headphones which offer vertical adjustment at the expense of mechanical solidity.
Then theres ancialliary concerns like the version of the AKG double arc headband on the K701 having those ridges on the headpad, making them very uncomfortable for those with very short or no hair.
All factors involve compromises. The LCD-2 would do well to adapt something along the lines of the 4070 or the AKG double arc imho. But I know first hand how tricky it is getting a headband to function well on a large ortho headphone. (coathangers and pads just doesn't cut the mustard).