I now realize that the HD595 is the best headphone I own.
I have a history of disliking the headphone due to "muffle:" a lack of clarity, crispness, and air to the sound. It was my introduction to quality headphones, and I was very disappointed in it. Once I got a KSC-35 I hated the HD595, and I eventually went on to getting a K701, which became my main headphone. During that time, I had tried the HD595 every once in a while, and found the "muffled" sound almost intolerable.
Well, I no longer hear it that way - it now sounds very natural, musical, and involving (in every way) to me. It could be the change of source to the Turtle Beach Audio Advantage Micro (TBAAM) that has made the difference. Now the HD595 is, to me, a beautiful-sounding headphone. The warmth, the sound stage, the euphony, the dynamics - it just all adds up to an extremely enjoyable and moving experience. This is music, what I've been missing while using the K701.
I will from now on use my HD595 to enjoy the experience of music, while using my K701 as my secondary can when I want a different (non-musical) sound. I probably won't use the K701 much at all, since it is such a dead, emotionless and thin headphone.