I should say that with the 3.50's mounted I gained some seat height, if you are short like me that might be a concern, but the improvement was well worth it. It pops up on the centerstand even easier than it did before too.
The 3.50 is very near the same height as the stock rear. The 3.50 on the front is almost an inch taller than stock, and I believe that's where the improved handling comes in. I've got 200 miles on them now and I'm very happy that I made the swap.