Giroux & Benn for me.
Benn because he has HITS and PIM
Giroux because he has proven he can put 80 points +
Stone would be my 3rd pick because although he is red hot and in a new team with better potential to explode, he still hasn't done a season over 75 points, whereas the other 2 have proven to be able to do it.
Plus trade value i would Giroux and Benn are worth more imo based on name alone