I have the same question
I don't like rails as much as jumps but i want to hit both.
Jumps at my mountain don't go over 65feet
i am 5' 3" and 120 pounds
I did not read the thread much yet but saw people pointed out the difference is mostly moved in flex points on PC
Also note that 07/08 Thalls are much, much softer than 09s(which are stiffer right underfoot if I remember right). The race base on PCs will do fine on rails. If you care, I think all Armadas come with a 0 0 degree edge tune(think 90 degrees) but I could be way wrong on that.
Definitely the pipe cleaner for you. Will do awesome in the park but also has a fast base and good cut for the groomers and pipe