From the actual lawsuit documents (emphasis is mine):
Valve’s monopolization and attempted monopolization have the purpose and effect of fixing and inflating prices in the relevant market.
EDIT: Uh… Exactly what part are we downvoting here? All I did was quote the lawsuit.
I use exactly this (minus the Yaxi pads), and also a pair of Grado SR80i at home.
The two sound remarkably similar. The KSC75 are just a lot more portable.