157ish would be your best bet. The 1st year, brown tire tread graphic was pretty stiff. I used to ride it for fun on our pimples here, when I was 190lbs, I also had 167,173. 157 was really too small for me but could really crank some crazy little turns with it. I'd think at your weight 160, it would be versitile at small/medium resorts. Sidecut was about 9.5, waist 19.
Later years had different flexes, narrower waists, 18cm, same sidecut. I can't remember which graphic was which flex/waist. The approximate cronology: gray, blue metallic, red, yellow, black? I'm lost after that. But I'm sure someone else here'll know.
Hope this helps some. :)