Ride Slack Country. It does great in the powder (you float like a dream) and it still holds an edge in the packed trails. Make sure you check the weight chart that accompanies the board selection (usually on what ever website you looking at) and don't forget to add as much weight as all of your snowboarding gear is (boots, bindings, board, snow jacket, snow pants, body armor, helmet) + your self.
Honestly, in all of my experience I would say stay away from Burton equipment. It's over priced for what it is, and they are the only ones to use that stupid 3 hole pattern so anyone making bindings to go on their board has to pay them a royalty. How is 3 screws holding your foot to the board better than 4? It's not. It's a money thing.
If your looking for a board that you can go crazy fast on groomers and it will always hold an edge look at Arbor. Their stuff handles like a dream and you actually get what your pay for. Don't get ripped off by Burton when other companies are offering much better for cheaper.