Honestly? I can't really give you advice when you have to stick to skullcandy, because generally the first advice I give is "Stay the hell away from Skullcandy".
They are, both in sound quality and in physical quality, inferior, especially in relation to the prices, to an extend that I concider them fashion accessoiries, not headphones. For really good headphones, look for Ultrasone, Beyerdynamic or AKG, and if those are too expensive, try Panasonic, Sony, Sennheiser and the likes.
But yeah since you're limited to them, there isn't really a "right" choice.