Matt Mosley of ESPN asks the question in his NFC East blog today at http://myespn.go.com/blogs/nfceast.
He picked Devin Thomas for the Skins, which I think is a good pick. However, my pick for breakout player would be Brian Orakpo -- who I think will get 8 to 10 sacks. I think Devin Thomas will get (hopefully at least) 50 catches.
Any other suggestions?