Ah Tim this is a rocky road you've chosen here. I have a 103 Street Glide with a std motor, pipes and a/cleaner. I run the power vision and its very simple to use and even has a self tuning mode. There are a huge selection of canned maps to give you a base setting running with basic mods. When you decide to get to a stg3 then canned maps should not be considered but a dynotune with a custom map specific to your combination is the preferred option. As for s/eagle tuners there are some clever folks on the forum that can assist you but again if your going to spend the $ on a stg3 then you need a reputable builder/tuner to get the best from your investment. What state do you live in
Pauly has good points there Pops, can I ask, what do you want out of it mate? How do you ride? Lot of folk think they ride hard but rarely get over 5krpm, be honest as it makes it easier to give suggestions, you might be happy with a cam and tune, depends what you expect from the engine.