Looking over the team, I'd dangle Montana unless you see him taking over a starting role when Stocker retires. I couldn't see dangling Stocker because of the contract and the extra year or else I'd consider moving him.
With Montana though, he's signing long term next year, the ratings look good and some owner will think they can make him a Cy caliber player and you have just been 'using him wrong' this entire time. Montana is the type of guy you could get some teams top prospect for.