I don't think we're landing a big, physical scoring winger and a top-four defenseman in one summer. But if I were going to try to swing it, I'd realize that Kronwall, Ericsson, DeKeyser, and Smith - they're Wings for the long haul, and that's going to be an issue because Ouellet, Sproul, Marchenko, Backman, and maybe Almqvist are all looking like they're going to be pretty good NHL defensemen. Package one or two of them along with one of Nyquist/Tatar/Sheahan/Jurco and a pick and/or a roster player or two (Andersson? Kindl? Lashoff?), and I think that winger or defenseman might be obtainable. Then make a splash in free agency for the other half, and there is your winger+dman double shot espresso.
THIS. Either we go balls to the walls to make a trade for someone worthwhile or we should promote the kids. Some fringe top 4 dman via free agency only makes things worse long term when our D prospects get poached when they run out of options.