Those would be the Beyerdynamic DT880 600ohm version. IMO the AKG's are in a different class than the Grado's and Alessandro which have a exaggerated frequency response in the midbass and high end and don't nearly have the bass extension of other headphones. If you are looking for a specific up front sound signature with a lot of sizzle, the Grado's/Alessandro would work. There are also a variety of different pad options for them and are easily moddable. As mentioned Grado/Alessandro are very easy to power on any device which might not be the case of the AKG's.
The great thing about a neutral headphone is that it is much easier to tailor the headphone to the sonic signature you desire than one that is coloured from the start.
