I'm going with The Crazies > Dawn of the Dead for remakes. Easily. The Crazies left room for improvement. Claiming you could improve Dawn of the Dead should be an execute-able offense. And I'll be damned if Zack Snyder is the guy to remake anything. I wouldn't trust him to remake Mountaintop Motel Massacre!!! And, what's wrong with Cronenberg's Fly? And Schrader's Cat People?