Length of board depends on what you do...generally speaking, you want to go shorter for park, and longer for freeride. Board length usuall depends on weight, riding style, boot size, and budget. At your weight, I'd go with something like a 151-ish for freeriding. This also depends on what type of freeriding you're doing. If you're riding groomers all the time, then you can do well on the 151, if you're riding pow, I'd definately go longer.