Due to gas prices, and the distance I drive each day, I'm concidering getting a motorcycle. I just started researching it and figured I might as well ask on good ole GT. First question is about size. My commute of about 90 miles round trip has me going 60+ for probably about 65 miles of it, with about 40 of those miles around 70. The rest is around 45, with some lights. From what little I've seen tonight I'm worried about a smaller bike being able to hand those speeds, for that amount of time. OTH bikes around 600cc don't seem to be recommended for new riders. Suggestions for comfort is appreciated as well since I'll be spending roughly an hour at a time on the bike. Am I correct in that most bikes get around 45-50 mpg? Thats about what I'm looking at to break even in fuel savings cost vs bike cost. Of course I'll have something of value to show for my money in the end. I'm simply talking monthly exspences. First couple years would be break even, then the savings really kick in, and I can always sell the bike and get some money back. I know that rider size makes a difference too. I'm 5'11" and 150lbs. I'd like more of a sport styled bike but am wondering about comfort after being on one for an hour.