They look great. The performance is mediocre. I think that they are the Hugo Boss of audio equipment, though the analogy is far from perfect.
I personally like Sennheisers and I'm really in love with V-Moda right now. The Crossfade M-100s are very clear for a broad range (http://v-moda.com/crossfade-m-100/), but honestly, the LP2 work just as well, at least for me: http://v-moda.com/crossfade-lp2-matte-black-metal/ You can totally nerd them out as well, but I mean, do you want to? (fwiw, I got my son a pair, with like, initialized shields, but it's super nerdy.)
The trendiest and best looking headphoens that I've seen in a minute are Master and Dynamic: http://www.masterdynamic.com/ Every tragically hip boutique, from Colette to Fred Segal, are carrying their stuff. I've only had a chance to try them out once, and the sound was good. But they look pretty awesome, and the clean aesthetic will match your version of Margiela well. (0)