sarp118773 wrote an answer about Rossignol S3 Ski - Women's on November 9, 2012
You may have already decided, but for future reference for others, based on the info, I'd say go for the longer ski, 168cm. Since this ski has a rocker profile, its going to ski a little shorter, not sure what the equivalent length would be, but it isn't 168. I'm 5'2", around the same weight, and an aggressive skier and I have the 168cm length and skied that all last season and loved 'em. You can bomb through anything on these guys!