Awesome review!!!! Wish you woulda also auditioned the Sennheiser HD650s and PX360s which is what I own. Just based on what other people say, seems like the HD650s have a warmer sound than the HD600s. I was musing the idea of one day going with either the HD700 or HD800s as I love the sound of both my Sennheisers. Mainly what I was looking for was a bit "more" in both highs and lows than what I get now fromt he HD650s from my next set of head phones. I think a few times you mentioned that the HD800s had less bass than the HD600s, and you seem to think the HD700s definitely have better bass response than either of the HD600s and HD800s.
So my guess is, if the HD650s offer a fuller, warmer, slightly bassier sound than then 600s and the 800s are lighter in bass than the 600s, then it seems like the HD700s would be my natural step up. I am certainly not looking for anything with an unnatural response to bass (like Beats) or an unnatural response to highs (like Bose). I would like to see how the HD700s comepare to the 650s in terms of highs.
I listen to all types of music on all types of media. Jazz, Blues, Rock, Metal, Latin, Rap...everything really. I have SACDs, CDs, 192/24 bit FLACs, regular FLACs and mp3s. My equipment is a little lacking, I mainly use the Fiio E9 desktop amp with my Yamaha HTR-3 series receiver. SACDs and CDs are played by a Sony BDP-480 player through HDMI so the receiver does the D-A conversion. But in the future I am looking to upgrade both player and pre-amp to either an Oppo 95 or Marantz UD7006 and to an Emotiva UMC-1 preamp. Havent decided on what headphone amp to get. It wouldn't be until I upgrade everything and see what the HD650s can REALLY do that I will consider buying another set of high end cans, but would appreciate if you could elaborate on anything I said, in regards to how I translated you general results.
For portable, I use the PX360 with he E7 Amp and Cowan J3 player.