I've thought about it and have pretty much decided my perfect pass stargazer will always pull basically the same no matter how much I upgrade it. That said I still might do that z box next year just because I can't help myself
But I think I might be satisfied to upgrade to the no magnet setup where you can map up to 3 courses. It would be nice to not need magnets for my favorite courses and that is only about $150.
What I've got to find out is 1) if z box will speed up the pp processor, 2) if the no mag timing is same speed as z box and 3) what version I have.