Nice. One pre-made package fits you that I recommend.
Ride Kink Package. Excellent park board for jibbing and decent on jumps.
Ride Kink Snowboard Package
Ride Kink Mens Snowboard 2011
If not, here are just the boards that I recommend:
Ride Crush: Good park board with mid-flex. Actually held an edge well on normal runs to thanks to the Slimewalls. Changes colors when it's in cold weather (aesthetics, but cool nonetheless).
Ride Crush Snowboard 2011
I looked through our custom Ride package builder and found two great options for under $700:
Ride Package Builder
Select the Kink or Crush (I favor the crush for you), 2010 Ride Contraband in Bone White (good lightweight binding for park), and the 2011 Ride Strapper Keeper boots (good soft park boots). There you go
You will also qualify for free skullcandy earbuds and Burton gift pack that includes DVD, scraper, leash, and stomp pad. Just talk to our customer service and they'll do everything for you if you.
Edit: By the way, when you build a custom package through us, you are saving 10% off each item after the board.