I am the exact same stats as you are (45, 180, 5'11"). Just bought the 67" Radar Theory with Vector binding front and ARTP. I really like the ski; easy to get up on and is pretty stable. I am trying to complete the slalom course for the first time and am hoping this ski will be good enough. Otherwise will have to pony up for the Senate. I am going to get the back Vector boot to replace the ARTP and will be looking forward to trying out that combo next spring. You should also check out www.wakehouse.com
. They've got pretty good deals on this years models as well as previous years. I actually got the 2012 Theory because I liked the red color better than the white. They also have a new 2012 Theory blemished that is selling for like $150 only sans bindings.