Sennheiser HD 570 v. HD 280 Pro

I currently own the HD 570s which are a great first pair of headphones. Unfortunatly, they are open headphones so I can every anything and everything that goes on in the dorm, at home, etc.
I'm looking to get a pair of closed headphones...

In terms of sound quality I would like to know people's opinion regarding the HD570 v. HD 280s in terms of sound quality, bass, comfort, etc... obviously this is somewhat objective but I'm curious as to how you all feel.

These headphones are going to be used a lot for travel. Feel free to make reccomendations for other closed headphones under $200.00 but I am more importantly concerned with the comparison of those two headphones!

Thanks hi-fi heads!