What your source is will be as important as the headphones themselves. AKG, IMO are quite neutral and so, particularly with my neutral MF amp, there is loads of bass detail, but not the oomph you may be looking for with techno and rock. I get bass, if the original recording had it.
Sennheiser make specific headphones that major on bass. For example the HD202 is tuned for extra bass over the very simlilar HD201s. My PMX200s are tuned for extra bass. The other brand that majors in bass IMO, is Denon with the AH D1001s being the most bass heavy headphones I have heard straight out of an ipod Nano.
You need to choose whether you want bass detail to hear the original recording and clear bass notes, or bass depth and add oomph and deep, driving bass notes to the music.