Replying to K2 Disorderly 09 Ski size

I'm 165.1 cm (5,4) tall and I need new pairs of skis.
This ski comes in 3 length 159cm, 169cm, and 179cm.
My current skis are 179cm and they are not center mounted so it is hard to do spin tricks.
The K2's are center mounted so it should make it easier to to do spin tricks but the only problem is I don't know if i should get the 159's or 169's.
I am 15 years old and I am probably going to grow a little bit over 170 cm and if I get these I don't want to out grow them because these are pretty expensive but then again i don't want to get long ones because it will be hard to maneuver and do tricks with.
What size should I get???????

Thanks, Nik