I can attest to Millennium Force's layout being the "best" in my opinion. For someone like myself who loves height and speed along with a smooth ride, Millennium Force is essentially the perfect coaster. Others that come to mind are Storm Runner, Apollo's Chariot, El Toro, I305, Rougarou, Lightning Racer, Alpengeist, Dominator, Magnum XL 200, Nitro and Skyrush. These are just the coaster's I have ridden however. Expedition Ge Force, Goliath(WW), Fury 325, The Voyage, Ravine Flyer II, and Superman at SFNE look like they are great coasters judging by their layouts alone. Maybe someday....