I've not read the whole thread so I apologise if this name has popped up before.
In terms of guys to bring in, I'm intrigued by Broncos LB Danny Trevathan. Experience playing in Wade Phillips 3-4 scheme and Denver have got quite a few guys to pay as well as a huge QB decision to make. If he's the odd man out, I would like to bring him in. Good against the run, sheds blocks, has coverage ability. Total package and he's only turning 26 in March.