I like both my Olfas and my Martellis. I am still getting used to the Martellis and the 60mm is a little bit more wobbly than my Olfa 60mm. That said, if you are going to be cutting a lot of strips or shapes, you might consider getting a Go Big or Go Big Electric, if you have the budget.
I personally have a Studio that I use for cutting any large number of items, but use my rotary cutters if I only have a few to do.