Most people who go over to pocket pcs generally stay. The most important thing is the functionality and if you actually need/want the features of any pocket pc.
That said, don't be scared of the touch pro. The base OS is windows mobile which is the same as many pocket pcs. But you'll see little of that with the beautiful and easy to use touch flo 3d.
Using the touch pro is as easy as this youtube vid shows...
http://www.youtube.com/watch?v=pENEldRxuwQ