I received a phone call today from a buddy of mine, looking to buy my 02 Cougar. We agreed on a price, but I now need to get a new bow. I call my shop, and he tells me he can set me up in an Alien X. I don't know much about the Rytera line, except I looked at the website and do not see the X in the 2012 line, only the XT and the Ultralight. The specs and price of the XT seem to reflect what he was talking about, but I am not 100%. I am going to check it out next week. What are the differences between the X (possible left over 2011), and the XT and Ultralight?