Comfortable sportbike is an oxymoron. Real RR sportbikes are designed to shave seconds on a racetrack, riding in a crouch with elbows tucked in to minimize wind resistance flying down the straights, suspensions finely tuned for the individual rider, maybe twitchy and unforgiving, requiring a lot of practice and skill to ride safely anywhere near their potential. You will not get weather protection or comfort for highway riding, they are not good for watching your back or looking over cars in traffic, and you will be a pretzel after a few hours and your butt will feel like you just spent your first night in jail. No S-T bike will offer racetrack performance, but you probably don't need or want that, especially in the mountains where you are virtually never going to use the top end anyway. S-T bikes are compromises between comfort and performance, and the FJR is one of the best all-around compromises emphasizing cornering ability, at least of those with shaft drives. Going in the other direction, a bike like a light dual sport or an SV or a Versys or a Strom will probably be even more fun in the twisties, with decent ergos, wide handlebars for leverage, will cost less to buy, maintain, and insure, and be relatively easy to ride fast in the mountains. However, they may not be so great for a 600 mile straight shot from FL to NC (some really nice twisties in N. GA, by the way). I don't think it is possible to have truly the best of both worlds, so you just have to pick your poison.
