I'm not saying he's untouchable, but I want more than Ryan Braun or Carlos Gonzalez in a trade involving Lopez. To me, you give up middling prospects for guys with big deals, as taking on the deal is the big win in the trade (like with Papelbon). The last thing I want to do is repeat what the Blue Jays did with Dickey or the Padres with Kemp.
If we're trading Lopez in a package, with his stock up this high, I'd expect to be getting back a Christian Yelich, Gregory Polanco, George Springer, or Nomar Mazara type player