ya im 5'11 and got the 182. everyone i talked to said the 173 feels really short. i havent skied mine yet so i dont know from expieriance. i also talked to someone who worked for atomic and said that the 182 would be perfect.
I think youd be OK, on the 173s, if you are at a lower skill level and what to be able to do tricks easier and what not, but if you are on the very high end skill level then id get the 183s. Basically personal preferance after that.