Replying to Studio/quality headphones

Hey People. So for my sound design class I am required to have a pair of nice studio headphones. I was kind of in a hurry to get some for class tomorrow and went to Target (the closest store to me)

Basically for the price range They had the Bose Over Ear ones for 150, the beats by dre for 199, and the skullcandy/roc nation aviators for 150.

I tried to compare them in store on the displays, but honestly could not hear much difference in sound. So I went with the Skullcandys because they are the most comfortable, and look the coolest in my opinion.

Now im sure there are more people who are more knowledgeable about sound then me, so I was wondering if anyone knows about a pair that would be a better bang for my buck. I know there are endless brands, and after some googling people seem to suggest other brands.

I like these a lot so far, but am definitely willing to return them if someone has a suggestion for something that I can either get better sound with, or save money on, or both.

Thanks in advance for any help!!