In response to wozzy's comment:
I'm going to go out on a limb here and say, health provided, this defense could finish the season as the top ranked defense in the NFL.
Major factors; Adrian Wilson, Tommy Kelly, Talib, Armond Armstead, Collins and a couple others draftees who will make the squad, as well as the jump made by the second year players.
We will jump from 15th in sacks, where we've ranked for a while up into the top 3 thanks to additions at DT.
Linebacker has never been this deep and the defensive backfield has always intercepted the ball regardless how "bad" this defense was perceived to be.
High expectations? Yeah, but history is on our side.
While it would be great that the Patriots Defense finish as the Top ranked Defense, I would disagree for the simple fact that there is a defense in the Bay Area with pro bowlers from the defensive line to the secondary in the San Francisco 49ers who (from the looks of things) will be Tops as they did rank 2nd in Points allowed giving up 17.1/g in 2012. The other team that could finish tops the Seahawks that finished 1st in Points allowed giving up 15.3 pts/g in 2012. The other team would be the Chicago Bears as they finishes 3rd in points allowed giving up 17.3 pts/g themselves. What thise three have in common is the core players are still intact. At the end of it all, the San Francisco 49ers will finish Tops in Defense.