Summary: January 1st 2014
First off "Happy New Year"
Took awhile but my HD700s finally showed up yesterday, a cursory listen (5-6 hrs) mirrored more or less yours and Mike’s impressions.
As mentioned above I’m using a Bryston BCD-1 as source balanced to a BHA-1 for amplification, so no hiss, hum, you name it just a jet black back-round allowing every little nuance to come through unscathed.
Pros: Very good imaging, staging is very speaker like, seamless tone from top to bottom, excellent clarity, midrange and tight tuneful bass.
Summary: Let me start off by say that i am not a perfectionist nor am i a totally audiophile, but rather an enthusiast (because my rig is mostly mid-fi) that never really found any need to post a headphone review, but since the HD700 has been getting mixed impressions i'd like to give my opinion, also i've only listened to the HD800 for around 30minutes therefore i will not compare them (c'mon guys its Sennheiser's flagship headphone for a reason).
Pros: Comfort, large soundstage, clear audio, design
Cons: Pricing, bright trebles, large redundant box
Summary: Sennheiser HD 700
At the moment I unfortunately have no time to write a complete review. So my apologies for that but I'm going to finish this review as soon as I can
Low pitch: 4/5
maybe not enough bass for the bass heads but for my taste just enough -and whats more important- HQ bass
Medium pitch: 5/5
Pros: overall sound quality, clarity, detail, mids, soundstage and separation, extreme comfort, good cable
Cons: little sibilant in the beginning, some fragile parts, maybe too bright for some people
Summary: Designed to fill the gap between the HD 650s and the flagship HD 800s, the new HD 700s essentially share the status of flagship top-of-the-line headphones with the 800s. The open 800s are superb dynamic headphones featuring spatial accuracy and unparalleled imaging. Their innovative design uses a large "ring radiator" driver that is positioned a bit forward of the ears and then angled slightly backwards so that they deliver a more planar wave front.
Pros: Superlative imaging, accuracy and transparency, generous sound stage, comfortable to wear
Cons: Expensive, its accurate sound is what some object to as the Sennheiser "veil"
Summary: Amazing. I have a pair of audio technica m50s & what I thought was a decent gaming headset (logitech g930s) but the sound from these with a decent amp and good quality music is unreal. You definitely need a good sound card to really appreciate these phones - I got the Asustek Xonar Essence STX 2 and it took things to a new level.