I'm not really sure your move was more lateral considering you weren't really taking a "huge" jump. Having Xt32 to me is for people with dedicated spaces,two subs, and a tough room. Waste of money for a living room system. Pro is an extra $700($550)+($150 liscense). With xt32, it has way way more filters compared to the other versions. With pro you can actually see what your room is doing and can tweak the filters and load them into the avr or prepro for more of a flat response.
If you really want to find out more about it, go to the avs thread on audyssey pro.