I'd bring him in in a heartbeat. I have always loved his talent, inensity, physicality, toughness, and passion for the game. If all you had to give up was at the max a 5th round pick, whats the risk?
There is potential for such a huge reward in a deal like that. He was arguably the best pass rusher in the game from 05 to 07. People love to talk about roids, but he was busted early in 06. He had a great season the following year in 07. He tried to play with a torn knee because he loves the game so much. Last year he had his ups and downs just like Brafy did in his first year back from knee surgery.
He is a dynamic playmaker at olb when healthy, which we need badly. He is someone defenses have to scheme for and would be a huge upgrade. BRING HIM IN.