P5 I have both and for the first month I kept using ppp but I forced my self to use P5 now I dont even think of opening ppp, P5 is just more powerful more tools more options better renders, yes it loads slowly some times and yes it takes time to get used to the new dials but once you do you wont like using the old ones. And the library layout makes things much simpler to find. With the machine youve got definitely P5 take time to learn it and youll love it.