I'm about 6' and a half. I weigh 150 pounds. I ski 40% park and groomers and 60% all mtn, trees, powder and bumps. I prefer a slightly, slightly smaller ski. ID rate myself as advanced. I still want a small enough ski where I can still throw them around and have a nice poppy, fairly flexy ski so that I can keep up with my buddy who where's 156 sick days in trees. Any sizing or ski suggestions? +K thanks guys.
Assuming 6' and a half means 6' and 1/2" I would recommend a ski between 176-184 depending on how long you like your skis. A longer ski is going to give you more stability than it will take away from your ability to throw it around. You can also look at skis with early rise in the tip and tail, which lets you ski a longer ski without it feeling huge under your feet.
Moment PB&J @ 182 would be my ski recommendation.
At 101 underfoot you will float fine through the trees / chutes / powder while still maintaining a solid ride throughout the park. While you'll be able to flex through butters and whatnot, it is not going to be a noodle flexy ski. If you plan on skiing 60% all mountain / trees / bumps I would suggest staying away from extremely flexy skis.