I'd have to go with the Magnum, all the way. Great hight, air-time, and no horse collars. Everything that is important to me.
But i always have to recognize one of my other favorites. The Racer at Kennywood. A classic John Miller from the 1920's; and the only reamaining continous track Racer in the states. Not the largest, but great hills and what i think is a beautiful looing coaster. Just plain fun