I'd have picked them for the Superbowl without Boldin. That defense is going to be brutal, going to be next to impossible to run on them, and they'll be able to bring the heat consistantly.
Offensively, Flacco has another year under his belt, Rice and McGahee are both fantastic runners. And Boldin, Mason, Stallworth, and Clayton are as good a 2 deep at reciever as you'll find outside Arizona, Indianapolis, New Orleans and Dallas. Good OLine all the way across. Only real weakness is CB, and with the pressure they'll bring they won't have to cover long.