The SigPros to me have exceeded the Edition 8 in terms of sound quality for my personal preference.
However, the Ed8s are still far more beautiful.
The T5Ps will compete with the Ed8s neck for neck, but personally, I prefer the Ed8s. I don't really like the beyer TOTL sound.
After extensively listening to the Sig Pro and the Edition 8, I have just come to the conclusion that they are just different. I agree with MuppetFace that the Ed8 is more of a "hi-fi" sound. And the Ed 8's soundstage and imaging is bar none. And you're right, the Ed8 is such a beautiful can, not to mention most comfortable I've ever worn.
Edited by SoundFreaq - 8/14/12 at 7:58am