I can never decide how much I like the aesthetics of the HiFiMAN lineup. I think that as far as a "utilitarian" looking design, they do it very well.
But I've always loved the HD800, think I might like the HD700 more based on the pictures I've seen. Can't say until I see a pair in person. That said, I don't like the HD650/600 style.
Grado's have a certain cool factor.