I've heard some very good things about ARWs, and not only for park but for all mountain too.
If I were you, I would go to a local shop that knows their stuff for park and such, and talk to them. It'll be way easier to get good info and a solid ski. They can look at your size and ask you the right questions to get a good ski. If you don't have a good local shop however, you might want to go to the reviews section here, and on freeskier.com, they'll help you too.
If you want more solid info though, you should probably tell us your weight, how strong you are, what level of skiing you are at, and whether you want a pure park ski or an all mountain ski too, as that will have a huge effect on the suggestions people throw out.
If you're just starting out in the park though, the Invader seems like a good choice. And I wouldn't go with a huge ski for your first year, you'll have trouble. Try to stay in between your nose and forehead.
"Firstly Pollard has a fierce rock wall of defense on newschoolers. People are immediately trashed for ever cursing his name. Tanner too has a loyal following, but in his course as the master of mordor, many have come to see fault in his ways.
Only Simon Aragont, with the help of the white wizard Eric Gandard, and potential allies TJ Shimli and Jon Legolosson, could ever defeat his mighty power. But wary they must be, for the C-orcs have been known to lurk around the base of the marijuana volcano!"