I see you like jazz but you should check out this song from tool. It highlights the wonderful dynamics of the Beyer's;
Also my cable below the Y joint has noticeably stiffened over time - something to watch out for.
I have just listened to the Tool track - I think that i see what you mean by the dynamics, but I shall listen again.
I only started listening to jazz a few months ago, and quickly realized that the traditional trios and quartets (piano, trumpet or sax, drums/cymbals, upright bass), usually recorded live and with little 'doctoring of the sound' in the recording studio, were hinting at a lot of 'previously hidden' elements in music, that my hifi struggled to release.
So after a few months I have better speakers, plus new Sennheiser HD598Se and Beyer 770 Pros and now these T51i's, plus the HA-2, and am enjoying my music again. I can now detect far more in even CD quality tracks, so i have now started to question if chasing hi-def music downloads is really necessary.
Part of this musical journey includes exploring online suggestions/recommendations like yours, and sometimes discovering hidden gems that I would never have considered before. In some respects, this mirrors my experience with the film club that I joined a few years ago. We avoid big budget/blockbuster films and instead focus on art house or world cinema. Most of the films that i have enjoyed the most, were films that previously I would not give have considered watching - so I have learnt the lesson not to let the initial assumption of whether a film will be good, influence negatively my choice of whether to try it.
Regarding the cable issue. I see that replacement cables are available
http://www.head-fi.org/t/732056/beyerdynamic-t51p-t51i-impressions-thread but it does sound like you have to solder them in place (post #15).