I'd rather have Perry over Seguin and Nash both, not that it really matters in the context of this thread.

This is a tough trade to make because of how hot Vanek is right now, but where my bigger concern lays, is in the difference between Purcell and Dupuis, I believe that Purcell is leaps and bounds better than Dupuis. But I still make the trade you are selling high on Vanek, and buying low on Perry, you are getting the best player in the deal, and of course Perry is a multi-cat stud.