I have recently moved to Colorado and spent my first winter renting boards I have only gotten to go a few times but have fallen in love with snowboarding so I am in the market for a new board. My skill level is, I can get down the mountain with very few wipeouts. I look to get much more proficient next season, wanting to get a little into the park but, concentrate mostly on all mountain. I am 5'11" 190 lbs; I want a a board that I can grow with. I have demo'd a 158 NS SL and a 157 Ride Buckwild. I don't think my skill level is good enough to know significant difference in board technology because I liked them both, only being able to compare to rentals. What board and size would you suggest for my wants.