some people will tell you not to get plastic bindings but they are full of shit because the chance of falling so hard that you crack the binding base is SLIM TO NONE. metal bindings are for the paranoid(IMO).
Disagree completely, personal experience>all.
Burton boards are fine, although I fall under the "similar/same performing boards can probably be found for less" camp. If you know there's a specific model you want though, I'd definitely go for it. I'm not a big fan of the IDEA (I can't comment if it works) on being confined to Burton bindings, and while I realize there's adapters I feel that might increase the chances of mishaps.
I'd definitely take a look at some other companies as well. Ride, k2, Rome, and NeverSummer ($$$) all have pretty good reputations for both boards and bindings (sans NeverSummer on the bindings as they have none). There's also GNU/Lib-Tech with their banana tech and magnatraction (I personally prefer a smooth side, smooth ride concept).
Ride's Machete might be something to look into as it's supposed to be able to handle the mountain, be good in the park, and it has a lowrise rocker (so rocker, but not an insane amount).
k2 has the Darkstar which is a park board that can be taken out of the park easily. The Angry Snowboarder Blog Archive K2 Darkstar with Ever Bindings A Closer Look
is a review of the Darkstar.
Rome... has boards. People seem happy with them, that's all I can say
NeverSummer has both the SL and the Evo that sound like they might fit your wants. If you're looking for a more park specific board, go with the Evo. Based off of conversations on the forum, the Evo is actually stable enough to take almost anywhere on the mountain while still being a great park board. The SL is going to be a lot stiffer, so unless you want an all mountain board I'd go with the Evo out of those two.
tl;dr: Burton's fine, maybe pricey. There's other brands, checking them out might be worth it. I'm paranoid.