I don't know much about the reno rocker, but if you only weigh 126lbs. you won't have any float issues. If I were you I would look at maybe a pair of seths. They're rockered and they come a bit shorter.
Go with the 185 Wall. Yer a big dude (no offense) and you will probably get the most mileage out of the walls. If this is gonna be yer only ski you might wanna think about mounting them back just a hair.