Disagree. The AD700 and MS-1 are both the best but for different reasons. For music only, the MS-1 would come up a the top. Add in movies/gaming the AD700 is a bit more versatile, while still performing excellent for music. Both of these cans beat out any of their competitors imo.
That's true. But in that case, you want two or four sets of headphones for the optimal choices in sound signatures. Bassy/non-bassy, open/closed. That's two to four sets right there. Of course, there's plenty of people who have even more.