well. customs in general are not very playful at all. all of em got a ton of tech, but all of em are really stiff. do you JUST want a burton board? or are you willing to branch out to other brands?
if you want a softer park board, especially when you're gonna be spending 80 percent of your time in the park, i'd try a burton twin or dominant. burton seven and love aren't that bad either. those are just burton though.
rome makes good park boards, so does capita, K2, and ride.
do some research, you're gonna want a board with Biax or triax laminant if you want it to be soft. preferably biax, especially inbetween the bindings to get you a buttery feel.