Tough to say what he would want, but with a rising cap $12M isn't out of the question (and had we managed the cap properly instead of giving out stupid deals to Miller, Sbisa, Dorsett, and Sutter maybe we could afford this easily).
Assuming we could work out a sign and trade I'd be very interested in Stamkos.
Obviously it depends on the cost, but outright saying no to these guys is downright stupid. You don't get this kind of elite talent through the draft unless you have a top 5 pick and are lucky, or are extremely good and lucky with a later pick which we've proven we really aren't.
I don't know that Stamkos would necessarily require a whole bunch of youth going to Tampa. Tampa is a team going for a Cup now. Sure they might want one young piece like a Horvat or McCann, but I could see them wanting some vets as well. Maybe something around Horvat, Edler, Vrbata, 1st round pick?