Which Snowboard should I get? (advanced)?

I am a solid advanced rider, looking to upgrade from my K2 Format, and I'd like to get a high level snowboard that has the right performance for its dollar. I've been riding for a while, and I seem to like the more responsive snowboard. I am more into super fast speeds, carving, and mive air so I like something a little stiffer and lighter. It MUST give me good control at high speeds however, and It needs to be able to work decent in icy conditions. I was looking at two that seem to fit this perfectly. I just want a WELL RESEARCHED conclusion on which is better. Option number 1: The 2010 Burton Custom X, and Option number two: The K2 Zero. My shoe size is 11, and I weigh about 150-160lbs. I know I need something in the 159-162 size range, but my shoe size requires a wider board. Please, no fighting about which brand is better. I just want simple, logical reasoning on which one is better, unless of course somebody knows a better choice. Thanks!