well, you could upgrade from skulls easily and get the Bose "around ear headphones" but those are $140 and frankly they aren't spectacular. I own a pair and they're generally ok, kinda lacking something...
under $100...check out Sennheiser and Shure. I would say Ultrasone cause I'm looking at a pair of those, but I don't know which models (if any) are under or at $100.
But most everything if you buy smart, you'll enjoy much much more than Skullcandy, I have yet to listen to a pair of skulls that I like. (For a while I wanted em really bad, purely from looks, then I listened to some...and they just made me sad)