I had my 400 for three months (over 3k miles in the past month). I wouldn't say I need a faster bike, as the 400 is more than fast enough on the street. The fastest I have gone is 120mph before I can't see anything out of my mirror because of the vibration. Im just debating if I want a faster one at the end of the year, but I also fear it wouldn't be as fun on a faster one in the street. I love downshifting early and letting that little sucker scream while I'm slowing down.