Im going to be the odd guy. I have both the 1.5" and the standard. Have shot deer, pigs, turkey, a ram and elk with the 1 1/8." I have only shot the 1.5" at deer with fine sucess, all my bow are 57-65#.
I just dont really have problums with blood trails. The guide for my ram said that he had never seen one go down as quickly with a bow.(Before someone says Yes it was a good shot and any good broadhead may have done the same) The blood trail I got from my 09' elk was just nasty, all with a 1 1/8" Chances are my 1.5" my never get used again.