If your doing 80% park, you can go ahead and scratch getting seths. The seths will be useless to you if your going 80% park. PEs wouldnt be to big, its just they are fairly stiff. I would categorize the PEs as an all mountain ski that can perform in the park, but if your doing 80% park, invaders, dumonts, foils, fujis, trouble makers...any of those should do the job, and do it quite well.
"So I jump ship in Hong Kong and make my way over to Tibet, and I get on as a looper at a course over in the Himalayas. A looper, you know, a caddy, a looper, a jock. So, I tell them I'm a pro jock, and who do you think they give me? The Dalai Lama, himself. Twelfth son of the Lama. The flowing robes, the grace, bald... striking. So, I'm on the first tee with him. I give him the driver. He hauls off and whacks one - big hitter, the Lama - long, into a ten-thousand foot crevasse"