A couple of thoughts. On my 07 Springer I put on the V&H Big Shot Staggered with a Fuel Pak. Results at the rear wheel (DynoJet 250 rear wheel dyno) was horsepower jumped to 88.87 (stock peak was 81.09) and torque went from 95.31 stock to 105.43. I should mention that I'm using the Quiet Baffle which robs a bit from peak numbers. Having said that, the bike's still pretty "throaty", plenty of volume.....my friends at V&H say that without the baffle fix-it tickets would be in my future. I've got almost 2,000 miles on the bike since the mods, and it runs great, absolutely no problems.
Also with regard the brakes, anyone who's tried to whoa-up a CVO Springer knows the stock brakes are less than stellar. I put a four piston PM set up front and replaced the rear unit with PM's as well. Kept the rotors stock. Huge difference, way more effective. Not to mention the fact that they look way trick.