TWerk if you are coming from a Sig DJ as it appears you may be the best way to describe the TH-900 in a nutshell would be like a more refined Sig Pro.
The Sig Pro is like a more refined Sig DJ. The TH-900 offers better attack, speed, decay, and more neutrality over the Sig Pro. Some have mentioned an issue with a toned down midrange (I personally don't hear it that way).
The TH-900 is a real genre master overall and easily competes with many of the current top tier hp's currently in production, a true Flagship offering.
Edited by Mortalcoil - 6/13/14 at 10:04pm