I'm 6'4" with 179s... just an FYI incase you were wondering...
Your weight has far more to do with what ski length you should be riding than your height. How on earth can your skis tell how tall you are. They respond to weight/forces created by strength.
6' i ride 180-181 for park, 186 for pow, 190 for given er and a 185 for everything in between. my quiver is still expanding at an alarming rate though. next ski will probably be 2010 seths.
5'10" 171 urban, 181 park. perfect size if you ask me. my chronics (181) are about as tall as me. looking to get a pair of lizzies for the trees though