PEs are not good park skis, learn what you're talking about.  they are damp, and have no pop, which makes them good all mountain, but not so hot in the park.  the best ski k2 makes for park would be silencers.  fujatives are too soft.  invaders would be decent.  it depends what you;re looking for, AR6s, trouble makers and STLs are all great in park without being terrible all mountain.