Replying to Blogs/Obsethed/Helixs

I am going to college out at Boulder next year and I wanted to try to sell my volkl walls cause i dont really ski that much park and get a ski that performs all over the mountain-something that shines in the powder and back country, but can handle the groomers when necesarry. So far after some extensive research the three top candidates are the Atomic Blog, the K2 Obsethed, and the Liberty Helixs. Any ideas as to which of those three skis I should get, or possibly something I may not have listed here that fits the requirements I want for my new ski?