Replying to Whitedot Director Ski Length?

I decided that the ski I am gonna be getting for next year is the whitedot director. However, I now have the question of what length, the 171cm or the 181cm.

Some info:
16 yo, 5' 6" currently but going to keep growing to be around 5' 8" next year
Weigh around 130lb but gonna keep gaining weight because i'm still growing
Want these skis to last
Ski in the PNW, specifically Alpental
Big mountain skier, love skiing freeride comps
Currently can ski 20-25ft cliffs but continually progressing
I'm interested in charging in them with the occasional tricks such as spinning or flipping, not going to do park in these skis
One advantage of the 181cm is they are 30% off on backcountry right now which is super helpful for my tiny wallet :)

What are your thoughts, 181 or 171 whitedot director?