I totally agree with the review of Skylab; what a great and honest review!
The reason I'm not really happy with the HD 800 is because I bought it as a reference headphone.
After listening to the recording of my choir (professionally recorded) I noticed that all of the
consonants 'S' sung by the female voices didn't sound natural at all; they sound like they were 'lispering'. I really thought there was something wrong with my headphone; but after googling for a solution for this, I found this review by Skylab that explained the problem. I listened to another choir recording (the third part from the Gloria from John Rutter sung by the Cambridge singers) with this lyrics:
"quoniam tu solus sanctus tu solus altissimus, tu solus Dominus, Tu solus Altissimus Jesu Christe..." http://www.youtube.com/watch?v=UUoN27W6hQ4
It's a pain to listen to those 's' sung in this case by boys ...
I think this isn't acceptable for a reference headphone with this price ...