Agreed. The Xpander/M-12 factory patches have to be some of the worst ever and are pretty embarrassing given the power of the synths.
There really isn't much out there in terms of downloadable patches that I've seen, but I recently came across a site with five different custom banks and I loaded them all. Among those five hundred sounds or so, there were really only 3 or 4 really interesting patches that warranted saving. I guess the bottom line is that if you want decent patches for these machines, you have to program your own!