So I've had my HP50s for a couple of days now. I can confirm the V-Moda audio cable fits perfectly and works without an issue, so if you need a longer cable for desktop use it's perfect.
Otherwise, I'm actually very happy with these headphones. They do sound very good indeed. Quite spacious and coherent. They also don't look anywhere near as bad on my head as they do on other people I've seen. I think it depends greatly on your hair and the shape of your head, and it works OK with my noggin! Comfort is good, maybe not quite at the level I'd want for all day desktop use, but certainly passes for listening for a few hours. I think I want to make this my portable headphone (once I get contact lenses).
Do your ears touch the drivers ? Mine do and my ears are not that big !