Cruise at 5k and change up at 5.5k, like the others I would like a 6th gear! I've wondered about dropping a tooth on the rear sprocket to be honest.
Edit to add, josephau, I'm not sure what BMW's you had, but on the ones I've ridden 6th has been very much an overdrive gear almost, not a gear for making progress with. Quite different from the 6 speed boxes on other bikes. On a Hayabusa in 6th at 186mph you are only doing close to 9.5k rpm, and if you remove the restriction it will pull all the way to the red I still have days where I miss mine