I am 5' 7" and about 128 pounds. I need an all mountain ski that wiil do well in powder, and/or a stiffer park ski. What I was thinking was a quiver like moment reno jibs and line Prophet 100s, OR a one ski quiver like Armada AR6 or Line Chronics. I have invaders that are too short for all mountain skiing and jumps over 30 ft that I will be using for my backyard and urban. I will be going to either Utah or Whistler this winter, and I will be skiing mostly powder and trees. Should I spend the money on two skis or can I get away with just one?