Replying to Ar5 or STL(, Scratch) and how long?

Hi,
now I am thinking of a ski to get here in Germany. I am 165/45kg and 14years old.
Which one to get for park, Bc and Piste also Moguls(EVERYTHING GOOD?).
STL in which size, AR5 in 160 or 170 when I go everything and am 165cm? And Scratch in 168, claire but get which one? And is the Marker 12.. a good binding?
I can't test a ski, and please 4Frnt and Rossi and Armada haters, please stay outside and if you have any comments, tell why you think so, please!
Best wishes and thank YOU!