For those who might consider the new Korg PA600. The German Korg division have recorded a very comprehensive 7-part video on Youtube that runs over more than an hour. Okay, it is in German but it is comprehensive that you may get a very good impression of what it can do and cannot do. Here is the link to part one, remember there are seven parts in all:
http://www.youtube.com/watch?v=hEFGKgb325Y&feature=relmfu

regards,
John Smies