I'm about a half-inch taller than you, and I ride 182 Armada Halos.
Optimal size will depend on several things, one of them being ski shape (the skis I'm on ski way shorter than they are due to their shape).. but I'd say no matter what those skis are too short.
But, if you're going out and having a fun time, and aren't having problems with your skis.. who am I to tell you that you shouldn't ski that short? Skiing is skiing. You're not a bitch, but I think you'd enjoy having a longer pair of skis.