Agree, it is all a personal choice. Most use the above mix at 50:1, but there are a few that like to mix at 40:1 and 32:1. The important thing is to jet your bike properly.
Since the bike is used on the road as well as trail I would lean towards a little more oil. 4 ounces (per imperial gallon) will give you a 40/1 ratio and 3.5 ounces (per imperial gallon) will be 45.7/1.
I'm on 28:1, never read a study on 2 stroke oil that said less oil is better for your engine, more oil always provides greater longevity of components and higher HP.