Well you're really looking at some high end boards as far as those two Burton ones go. I've never ridden them but Burton is usually pretty overpriced and I don't want to tell you to but I would stay clear of them you're really paying for the name. I don't have any experience with Never Summer boards but I hear they are really nice and I know alot of people here ride them so you should get some better help soon enough.
I would just say to remember that the most expensive board really isn't necessarily the best. Check out some Rome boards they some really nice ones too. And also don't pick your board because of the graphics, not saying you are just saying alot of first time buyers do so. Really look into the tech on the board and base it off that, then pick the best looking one. I ride a damn banana for christ's sake.