Hey guys, I just took a look at the D901s and look what I found:
From the steel to the rotatable earcup design*, they seem to be like siblings, only that the d901 went to college and finished. Looks-wise they have to be competitors without a second thought, but sound-wise...you already know. If I bought the d901s...I wonder where I'll get the money for these things? This pair costs more than both my pianos (okay, the other one isn't exactly a piano) combined!
*The rotation hinges are connected to the inside of the headband and not the outside, like the Monster Ncredible Npulse.