I had no idea they had changed from the 110/80 to 110/90. I guess that means all from 07 on have that? Maybe they wanted to get the speedos more accurate by going with a taller tire.
My Bridgestones were inexpensive OEM tires and I've gotten great wear out of them. I'll probably have 21,000 miles before really getting to the rear wear indicators. Front are not there yet. I had heard the original stock Bridgestone tires were not very good, but I've only had experience with those. I don't have any complaint with holding ability or wet weather. I certainly would be interested if a better tire made noticeable improvements. Since searching back posts, there's a lot of people saying they only get 6-8K out of tires. That seems really bad to me.
I'm still looking at options and open to input from anyone that's tried different tires, as well as, comments on different front tire sizes.