In my opinion, the Goat Coaster is the best, but you definitely cannot miss the Smoky Mountain Alpine Coaster, which seems to be much more popular, for very good reasons. I personally prefer Goat Coaster because I love the seemingly constant turns on it, but SMAC is definitely my second favorite, and I prefer night rides on SMAC to the Goat Coaster. If you have the chance to try both, I would do both, but if you had to pick ONE, go with SMAC.