I did not mean that the ps1000 sounds identical to the ps500, but that the ps500 uses identical materials and cost 1000 dollars cheaper. The ps1000 driver is the same as the ps500's but it has been tweaked to accommodate the larger pads (which I believe is done by punching holes to allow my air through the driver). Some hf-2 and ps500 owners have tried this and found that it ends up sounding nearly the same.
The only actual difference between the ps1000 and the ps500 material wise is that the ps1000 uses bigger (heavier) metal outer cups and has more padding on the headband (which is really just to compensate for the excess weight added by the outer cups) .
So are you okay with spending $1000 for R and D (if you even want to call it that)...
Edited by Chefguru - 6/20/12 at 10:24am