If this is for your middle team, with the five keepers, I suppose I'd do it b/c Stamkos IS a better bet than Seguin. But only because it makes that keeper position stronger...because I can't help but think the other two spots, for you, become much worse...albeit only over the course of one season.

Stamkos is pretty durned good, but I think Seguin is going to be awfully sweet awfully soon.

Add in that you're giving up a potential high goal guy in Nash and a top offensive dman in Letang and it would be really tough to tell you to make the trade.... unless the move is to improve that one keeper spot.