Replying to What ski?

I am looking for what ski to get for next season i am looking at on3p blue steele(rockerd) and armada halo(alpha 2). I would like reviews on both skis. Also open to other skis

Specs:

Age 13 growing(alot)
Height: 5.7-5.8
weight: 135 lbs.
It will be my main park ski i ski 67% jumps 33% rails.

My main dilemma is what length i read almost all ski threads so i know a lot about the skis, this thread is mostly about sizing.
If i got the halo should i get the 176, 170 or 182.
If i got the BS should i get the 171 or 181 i like my skis longer but not way to long.