Random thoughts:

The biggest cap hits of Perry's contract occur after Clay Matthews' current contract has expired.
Hyde probably nets a 5th round comp pick next year.
Peppers maybe a 6th-7th.
Hopefully Jared Cook gets a good enough contract somewhere to cancel out Bennett signing in comp pick equation.
Losing Lang would likely net a 3rd. 4th at worst.
No clue about Lacy's worth.