This is tough. In terms of value it's kinda fair, though I feel like you're overpaying a bit. My reservation with it is that McCutchen has been an absolute beast and losing him will greatly hurt your offense. You'd rely very heavily on fairly unproven bats in Saunders and Fowler, who could easily end up being droppable let alone unlikely to fill McCutch's shoes. Verlander is obviously a stud, and you really need one for that staff (especially since Beachy could well end up missing months), but it's not as if Kuroda is a slouch.
I'd hold, but continue to look aggressively for a pitcher that wouldn't cost McCutch... maybe get someone to pay for an Upton bounceback?