So I ordered up the HE-560 instead of the Sundara despite having not heard them. I saw a few people on HeadFi indicate they thought the HE-560 sounded better than the Sundara. I had been eyeballing the HE-560's for many months as an upgrade to my HE-500s when they first dropped to $499. Supposedly they're on their way to being discontinued with production already stopped and they are quite a bit cheaper than when they first came out. On the other hand, the Sundara is brand new and still at the opening price.
Does the older originally $899, now $499 model sound better than the new $499 model? I guess I will find out.