at 160 lbs you could probably get away with either. Personally, I enjoy powder much more than groomers, so my favoritism would be towards the 100. And if you want lively, this is the ski. If you want it to be softer you can opt for the Line flight, which looks the same but doesn't have the metal matrix. If you consider yourself intermediate or upper intermediate, get the flight. If you consider yourself a hard charger, get the Prophet. Again, personally, I would suggest the 179 for you in the prophet if you are a hard charger. I consider myself a hard charger, am 145 lbs, 5'8'', and would opt for the 179, even though I feel it is about a 4cm stretch for me. If you are just on the upper intermediate side of things, get the flight in the 172.