The Triumph Rocket 111's are heavily restricted in the air inlet department, a set of free flowing mufflers, pod filters (or Ram Air) and a re tune can easily give you another 30 RWHP and a considerable amount of extra grunt.
Welcome Peabody ! Not trying to be Debbie Downer but there is something you should know. Some (not all) early Rocket's had 2nd gear problems (popping out under heavy load). It usually showed up around 10,000 miles. Take your vin number to your local Triumph dealer and they can tell you if it's had the update kit installed. I would check that before I did any heavy power mods.