i'm also 5'5' and 120. I have Volkl Vs from a few years ago, and they were my first twin tip. I got them for like 320$, but don't get volkls. Theyre fine for just riding, but to stiff to butter, etc. I have 158s (and the length is perfect for me) and my friend who is about the same size has 168s (which are too long). I'm trying to buy a pair of Armada AR5s in 160 for next season. (i used to race) Definately get something thats in the 158-165 range. Any shorter will look gay, and any longer will be harder for you to flex/get around in spins/etc. Its hard as hell to find twin tip 160s that arent ugly. all the promodels are like 175. Lines are cheaper, but i hear they fall apart more easily, but that was a couple years ago. Get Dynastar troublemakers, AR5s, 4frnt MSPs, K2 PEs, or 1080s. They're all good skis. Those are basically your options. how much money you spend should depend on how much money you have and how serious you are about it. i would look at the 02/03 models if money is an issue.