it depends what you want to do with it and your skill, in MY OPINION it is too big. I am 6'3 and 210 and ride a 158 proto. I ride that in almost all conditions other then 18+ inches of fresh powder. so IMO i think you could/should size down. Also you dont really need a wide but that is a different story.
Rides website says which size boots fit which bindings. If you fall in the range then you are fine.