I personally own some of the headphones that are rated in this guide. The LCD-2F's, LCD-X's, HD800's and HD650's.
The comments on the LCD-X's confuse me. Note that I've never heard any of the Audeze headphones without fazors.
"Not bad, but the LCD-2 Fazor is better and cheaper. Why does this even exist?"
This does not echo my experience with the 2F's vs X's at all. The X's improve on my 2F's in almost every single aspect, with the most obvious areas being soundstage size (especially depth), instrument separation and air. The only aspect that I preferred the LCD-2F's in was with the forwardness of mids; voices sound a little bit more intimate.
"Off timbre kills it for me. Still an Audeze."
I really don't hear it. I noticed these comments about the LCD-2F's, too. If you were talking about some of the Ultrasone models, I'd be more likely to agree.
Maybe I just don't have enough experience with all the gear out there, so I'll see if my opinion changes once the Valhalla 2 arrives for the HD650's and HD800's. I currently consider all four headphones as excellent.