I'd be wary about getting a newer model with a cheaper price - if you're looking for a less expensive ski try to find a few years old, more durable one. Ski companies typically make no adjustments or minor adjustments to their skis over a 3-4 year period besides graffics, so an older model will ski essentially the same as a newer one. Based on your height/weight I'd imagine you'll destroy an afterbang real fast because of how soft they are. Look for a ski in the 178-185 range that is considered to be reasonably stiff (it will likely feel mildly soft to you). A small ski (170) or a really soft ski (afterbang) probably won't do well in holding up the abuse you'll put on them. If you can find an older model Volkl Wall, Armada AR7, Fischer Addict Pro, or Rossi S4 for cheap in your size you'll be much better off.