I found this on youtube. It's a short Chicago regional clip of Eric Allen's opinion when asked which Defense was better; Buddy Ryan's 1985 famed 46 Defense or Lovie Smith's impressive 2012 Tampa 2. Allen goes on to speak a little on how the 85 Bears D would do against today's pass happy, rules aided NFL offenses.

Chicago Hot Button: 1985 Bears Defense vs. 2012 Bears Defense (via ESPN)

Personally, I think we have great players all throughout our defensive roster. I think we have solid rotational guys. I think safety is a question mark, but that we have some intriguing and unproven prospects there, and I'm uncertain on our CB depth because I just am ignorant on that area of our roster. What I am most nervous about, however, is how resilient are our players? Are Sean Lee and Bruce Carter going to be injury prone their whole careers, are DWare and Rat missing 3-5 games apiece annually the new norm, can our safeties ever piece together a full season? I think these are noteworthy concerns because, although I like a number of our backups, my analysis of them changes drastically when evaluating them as starters rather than rotational guys.

Birddog says we have the personnel to play a Tampa 2, Garrett pulled the trigger and seems to be on board with the Kiffen move, Kiffen accepted the job knowing the personnel we have on hand...all things seem to point to us having the personnel and I read that the system is easy to understand so we can probably even pick it up and execute this new defense relatively quickly. I'm intrigued, but I am tempered as well. At the end of the day, it is still a seismic shift in stance and philosophy and it will be interesting to see how our guys shift into this D and whether they can stay healthy.