I really hate to post this, but...
Airborne gets hate on all the time because they look like shitty department store bikes, but honestly they are fine for someone just trying to get into the sport. Unless you buy used (which I would highly recommend) you won't find a bike for cheaper with this level of parts on it. The frames aren't the strongest, but if your just starting out in the sport you wont be abusing your bike like a world cup downhiller (shout out to gwinny on the win yesterday).