Replying to Would the Chronic Blend be good for me?

I'm 6'3'', ~180 lb and I'm going to be skiing in colorado all this year nd will probably be about 60% all mt, 40% park. I was also thinking about the Karma or Scratch BC but I can get the blends for $380 rather than $600 for the other ones and the Scratch BC is pretty big. I was also wondering what it is like going to bigger skis because right now i have skis way to small for me (line mike nicks 171 with like 76 waist i think, they were my first pair of skis and didnt know much when i was buying them). Are they hard getting used to? Any help is appricated thanks. Also, I am open to other suggestions.