'05 Ultra, 3.37 primary gearing, 95", 10:1 CR, 37G cams and V&H Dresser Duals w/ the FatShotz.
With the V&H Ovals the thing was pretty brutal at interstate speeds (80-ish), and I decided it was stupid to have the stereo pegged with the HogTunes speakers just to be able to hear it.
Obviously, I have no cats and more compression, etc., but it still sounds good when i get on it and at idle, it's just not punishing at speed any more. Mine are the SE FatShots w/ the open end cap. Already had it tuned with the Ovals and there isn't enough difference to justify a re-tune. You can always add disks if they're too sedate for you.