If you really want an all mountain option then go for the JJ, the EP is a load of fun but it is huge and soft. The JJ is better on groomers, on drops, for charging etc. The EP has better float and is more 'fun' for playing around in pow. Of the two I would get the JJ and avoid rails, but there are other skis I would take over those.
Bentchetlers for one (fatter than the JJ but with a similar shape), Surface One Lifes for another, my pow ski for this season (fat edges and more rocker), Moment night trains (fat edges, light weight).. there are a lot of great skis in this field now.