I am a few inches shorter than you and a bit heavier (damn baby weight) and ski the 165, so for the OP that is the absolute shortest I would go. I am also a pretty aggressive skiier, and everyone tells me that the TST skis short, but I like the length I have. Granted I did not try the 175 before buying. I previously skied a 168cm traditionally cambered, stiff ski and did not want that type of ski as I prefer to stick to tight trees and bumps. I am rarely cutting railroad tracks on a groomer and if I am, I can take a sacrifice in performance because I prefer to only have one pair of downhill skis instead of a quiver to choose from. I would definitely try both lengths though, to see which you prefer, as you could probably go either way but are more likely to enjoy the 175. As others said, the mens and womens are the same in this ski aside from topsheet, so find a demo shop and if they don't carry both length in the W you can demo the men's version. Also note that according to a recent review I read, the new version of this ski is slightly different than the previous years and so I can't vouch for how it skis (there is a review of it on Skidiva.com if you're interested) and it seems like the changes are all pretty positive in reference to performance.