Okay! Got my ES-HF300's today.
The build is very nice, let me say that first. Very solid indeed. The metal feels nice and cold, solid. And the plastic is very sturdy, too. Good quality pleather, feels soft and not overly thin or thick. The padding feels good to me, too. I heard people complain that it's not soft enough, so I was worried about it being stiff, but I'm pleasantly surprised.
To my relief, they're actually quite comfortable so far! A damn sight better than the V-Moda M80, that's for sure. They also look pretty darn sexy, especially with the cable. Though one small disappointment with that for me is that the chrome parts are plastic, not metal as I thought they were. A bit of a bummer, but not a large complaint. As you can see, the jack is a little large. I can see it being a problem with some cases, for sure. But, I don't care since I don't use them.
As for sound, I'm impressed! They're very much like the M80 but a good step up or two in quality. They're cleaner and tighter all round to my ears, with less grain. That's great considering they go for around the same price as the M80. So really, I'd say that the V-Moda has the edge (not a large one, mind you) in terms of looks, build quality and accessories / features, areas which the Onkyo are still perfectly good in (especially the first two where they're nipping at the heels of the V-Moda) However the Onkyo is definitely superior in terms of isolation, sound quality and comfort for me. Overall, I think these are the better headphones!
I'll give them a full review eventually, but my first impressions are that they're very nice on ear headphones! I wouldn't hesitate to buy them if you're unsure.
Edited by HeretixAevum - 10/10/13 at 5:24pm