Alpha 1 is the stiffest and meant more for jumps, so the thall and halo would be a better choice if you like softer skis. Then you need to decide whether you want camber (thall) or rocker (halo) which is just up to your preference.
If you look any skis other than armada, I would recommend the atomic punx. They are very light and buttery, and they sound perfect for you. I love mine. (the 2014 skis will be stiffer)