A stiffer boot sounds like what you need for the type of skiing you are doing.
however i cannot recommend you a boot as I am not bottfitting over the net and neither am i a bootfitter.
Go to a boot fitter, but i am guessing you have narrow feet.
Stiffer boot will help you charge in bigmountain but sucks for dropping cliffs and skiing in the park(in my personal opinion). I get ridiculous shin-bang from stiff boots, but if you haven't in the past, maybe jump up a little in stiffness.