At 5'6" and ~160# the drivers seat fits about as perfectly as a seat can fit, it wouldn't bother me though if the base was about 1" longer or the front 1/3 was adjustable and had a bit more padding .
About moving out of the "passing" lane - I find that moving in and out of the right lane can be the wrong way to play it a lot of the time. I tend to run 4<>7 over and it sucks when you have to slow down below the limit to let someone doing slightly faster pass then get on it hard to get back up to speed. I prefer to roll in the left lane most of the time at as steady a speed as possible and continually pass the right lane cars doing near the speed limit and move over when necessary. I hate that getting stuffed and jammed up feeling.
Re: Noise - When I finally went away from the stock tires it got a lot better. I do anywhere from 3-12 hours a day in the car 10 times a month on a wide variety of pavement types (sometimes dirt roads too) and the noise with the original rubber was unbearable. Conti DWS FTW
