I've got the EXACT same setup. I love my 700s, they're fucking bomb proof. Well, not bomb proof obviously, but so durable and SUCH good quality. I would ski with them, but they're pretty heavy, so that's my only complaint. Though, my earbuds work just fine.
I have a bunch of friends who ride with skullcandys and they love them. After having some pretty gnar falls, they're still holding up, so as of right now I can't say anything bad about skullcandys, but I'm willing to bet I can say so many more good things about sony.