I actually like to collect different brand headphones to try the different flavors. I had the Grado 325is, and now have the HD600s and almost dropped in on a pair of DT880s and HD25-IIs. But in the end, I seem to be collecting more and more AKGs instead....
AKG 181DJs
Q701 - Seems not so much love for the Qs? These are an amazing buy at the price it's going for right now under $200.
AKG 340 - The gay-ol' electret - dynamic. The electret sound is legendary, but mine has only the screen mod, so I still hear the awkwardness of the dynamic driver. I'm a little weary of going for my soldering iron tho. Maybe I'll get there, one day.
And I'm getting itchy to try out a pair of Sextetts
And those AKG 551s look sleek!