I'm really comfortable with HD-25 bass wise, too the point I think I will break them pushing it too much. My only problem is they don't sit too well on the ears need to put a headband around them to seal it properly. Where on the other hand where they're not even sealed they cause cuts to my ears due to the pressure of the bands. This made me want to switch to open-ear headphones. I am switching the pads to velour, maybe it will help.
Over all, with the ALPEN 2 as I said it pushes the bass perceptibly beyond the cans limit. On certain artist the lack of power definitely comes out. The vocal ranges are not bright by any means, and on dark tracks it becomes hard to enjoy. The details are adequate however it in general seems very distant. I don't mind audio sounding as if it takes the long path to reach your ears, however these are right there and it just seems to be in the background. It could be a lot more vivid, and attentive, brought forward.
I am updating to a silver dragon V3 to improve the detail aspect, beyond that I would probably switch to the T1's or LCD2. Leaning more towards the T1. Will see how the cables/pads improve the issues I addressed above. All so commissioning moon-audio for a mini co-ax to go between my Alpen 2 and X3II.
Sorry for my horrible literature, still new to audio appreciation, going to try out golden ears to improve my terminology.