If you are going to be traveling on roads with speeds up to 60 mph and you plan on staying with 60 mph traffic, I would suggest you go with a scooter that has at least 150-200cc's...and preferably the latter for hill-climbing, speed-maintaining and some reserve power (even on flat roads) on tap. 150cc scoots that I have ridden, with few exceptions and depending on the scoot, require you to operate them close to or at wide open throttle to travel around 60 mph, especially if there is wind in your face and/or hills involved. Some 150cc scoots, like lighter and fuel-injected ones aren't too bad for speeds around 60 mph, but on most 150cc's, you'll likely be wishing you had a little more power on occasion. If you can afford to go with a 200cc class scoot, I doubt you'll regret it. BTW, what is your budget range? As far as the brand goes, stick with a brand that has a great dealership network...that is key. Brands that have week dealer networks have terrible parts and servicing situations, which is reflected in the resale value down the road. I like the SYM HD200, it's a real sweet scoot, however, I wouldn't touch a SYM product until they get their US distributor situation shored-up real good and that's gonna take several years. You will pay more for brands that have a better dealer network, but it's usually money well-spent in the long run.