I haven't seen any threads on Yamaha's new flagship receiver - the Z1. I own a DSP-A1, an while I HAVE listened to the Z1 at the local dealer (unfortunately not properly set-up), they didn't have a used A1 to do an A/B comparison. They won't lend their demo unit, and the few units they have received were all pre-sold. (It seems Yamaha can't build them fast enough.) Has anyone compared these two units with everything else being equal?