Replying to Punx sizing

Alright so here's my dilemma. I am around 5'5'' right now and my 4FRNT Switchblades are beaten to shit. I'm gonna keep riding them till i get new ones. I can get brand new 2012-13 Atomic Punx with some Atomic bindings for 275. My uncle gets employee discount with his company. But I'm not too sure if i should get the 164 or 173 for next year. I weight around 130 and about 60% jumps and 40% rails. Do you think if I grow a couple inches over the summer the 164 would be fine still? or should i just go to 173? thanks and +k for help