Actually it is a PA2X Pro and -yes- I have created a lot of loops, but I use them mainly as multipads to implement the existing styles and give them a live feel. This is also because I have to agree with what you said about the difficulty of finding appropriate loops to build a real style from scratch (including intro, endings and especially fills); probably the best way to do this is to sample the drum track of another arranger (I am thinking of my G-70, or maybe a Midjay plus).
I wish I could borrow an Audya from someone just to sample its loops...