Does anyone have any experience with White Bros. E Series slip ons? How about the E-Series vs. Super Trapp? I'm interested in the tunable disks. I have a '03 Road King on the way. Looking for a good pipe to run with Fuel Injection. I plan on using a Power Commander with the S.E. stage 1 breather kit. I'm used to CV. This will be my first experience with fuel injection.