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.