I liked my 12 tooth. I never topped my quad out, and I liked to be able to pull up wheelies easier. = Totally worth it.
My suggestion is pick up a 12 tooth and 14 tooth, this why you have variety.
I also installed a 14 tooth and it was harder to start a wheelie from a slow speed, but easier to stay in them.
I loved the 12 tooth because I like going like 2mph and then just crank the gas and pull up.