You're from Utah, right?? Asuming most of your riding is going to be @5000' elevation, I would recommend 19cc domes, they will put you around 145 psi and you can still get away with running pump gas. If you ever ride much lower elevations you may want to consider larger domes or you will have to run race fuel. You won't really loose power running a ported motor with stock carbs, but a larger set will compliment a port job better. All of your mods should be carefully decided to work well together for your style/type of riding. My mods are in my sig, My next mod (and soon hopefully) is a set of 32mm flatslide carbs.