I would have to say dont get the custom x as a new snowboarder. The board isnt very forgiving to new riders. It is a soft ride, but it has a lot of feel to the board, creating a nice speed and response, but a somewhat bumpy ride.
Look at some ride boards if you are new, something liek the ride agenda which as the slimewalls, The slimewalls help absorb feel on turns. You can go over bumpier terrain without bouncing as much.
If you arent going to do park, and for a new boarder this is what I would get
Ride Agenda- 319
Ride Bindings- (any one that is made of aircraft metal- increases response)
always buy a board that isnt to advance, boards to advanced can be way to responsive, and is much easier to fall...
If you are looking at a Burton, I would get something like the Blunt or the Hero...