I have taken the plunge and ordered an AE-5, which should arrive early next week.
I am looking forward to seeing if this is a viable replacement for my X-F Titanium, if not an upgrade. Everything I read and hear about it says it ought to be.
My biggest concern is regarding surround sound on my 5.1 setup. I have seen screenshots with a surround setting, so I am hopeful I will get good output on my rear speakers.
If you are using analogue cables it'll be great 5.1 sound, if optical you are out of luck because it has no dolby digital encoding.