Dirt jump beginner help!!

I have ridden dirt bikes and mountains bike all my life, but now I want to get into dirt jumping. I have been shopping around and I have no idea what I should get. I have about a $800 limit and want front and back disc brakes, hard tail and of course front shocks. I'm looking for something that will be good for starting but something Ill be able to ride when I get better and more serious.

Thanks