I was also thinking punx..im the same size and weight as you but I think 173 will be to short and 182 to long. Im getting another ski in 177 or something.
im almost 6 feet and i skied the 184 urban punx this season...because of the way they're constructed they kind of ski shorter than a 180+ ski and they're also quite light...its still a long ski for you but it depends on what you prefer...