My friend had public enemies for park and hated them. I rode them for a little bit, too stiff , heavy, and unresponsive. He had an incredibly hard time getting them to spin. But when he moved to a lighter ski he was super good probably due in part to the fact that he had 'weight trained' with the PE's. I also won a pair in a pipe comp and sold them on ebay for like 2 hundy something. I would definitly not want them for park or anything else. Theres plenty of other skis and brands out there. I would suggest going with a ski from companies that have been around for a while. Personally I think volkl makes the best skis especially for carving and all around terrain. The walls are technically a park ski but there stiffness and wideness make them into a more all around ski. If you like to play around all over the mountain that's what I would suggest.
If you want a ski more big mountain oriented go with the bridge
PE im my opinon are a really good ski for me. they are stiffer and heavier than some park skis but they are bomb proof, can carve and for me they have a really good swing weight. If you look at extrems they have the same dimensions but a stronger sidewall and lighter/stronger topsheet. The pes are great for some people and some people hate them. Personaly I think they are one of the most versatile twin tips on the market