You are as fortunate as I! Lucky, I have 1 old set of D7000 that's great condition that requires a little tlc once in a while, PLUS a new mint set still in the box that are ready if the old set gives out. The TH900 is simply to harsh compared to the D7000. The highs on the TH are a touch more detailed (10%) but are WAY to harsh and completely cripple the enjoyment. As far as bass, the TH900 doesnt carry the bulk of the low end weight the D7000 does. The TH seems to focus and carry about 10% extra on the "sub bass" but leaves the the majority of the bass spectrum shallow compared to the 7000. So basically the TH900 can reach a bit lower is sub bass vibration, doesn't carry the heft throughout the tune and the volume has to be so high on the TH to actually get the desired bass that the highs destroy your ears in the high register during the process. The D7000 is still the unsurpassed masterpiece in the Dynamic realm IMO. And Im not spending 5K for something to get 10% better. The law of diminishing returns certainly apply here. D7K is king.