for me, i see better boot-binding fit when sticking with burton. The only other option is Union, cause they will fit. I don't like that Union does not have ankle strap height adjustments, where Burton have 3 different angles. I like supporting the C3 company because they are metal, but the binding/boot fit thing is so personal, it is not even worth the personal opinion.
If that burton boot fits and you can get the hours in without pain, rock on and find the binding that is cheapest and the most funkadelic colors for your scene.