Replying to These threads are everywhere...

...but I really truly am stuck. I know that there are many "Right ski size for me?" threads, and I have gained some info from them, but I need to ask the question:

I am 5'6" (you can probably round it up to 5'7", haha) 135 lbs., high intermediate/advanced skier. I ski in MA, so mostly park and when I can the rest of the mountain. I would like to get a fat ski that is stable off big booters, so I figured the Armada ARV would suit me perfectly. I buy my skis, so I don't want to buy a ski that I will end up growing out of. Now, should I get the 165 ARV somewhere, or should I man up and get the 175 ARV for real cheap locally? Again, thanks for all the help!