As a beginner, I'd just get a cheaper board so you know what kind of rider you are and what you want to do with it, and to learn.
Having scratches and chips on a brand new expensive board will cause few tears to shed.
I know someone who bought the most expensive set-up from burton, just to give up on it after a season because he found that he didn't enjoy snowboarding.
K2s are decent boards, as well as Forum. I have a Burton myself.. but I don't know if it's worth all the money for the brand new season boards. >_< So pricy! Most boards you can learn and grow with, so pick an all-around board.. as in not too stiff and not too flexible.
It'll be a good season this year.. Enjoy!!