Ok thanks ^^ , allready have seen this link , but as you pointed out , there no significal speach about difference in sound wich seams good too :) (didn't paid attention when first read it) , will follow it closely too .
AD2000X pads seam ticker but puting AD2000X pads on AD2000 should alter the sound . I will think twice before but if AD2000X sound exactly as AD2000 and no touching driver issue , i will sure be tempted .
Putting thicker pads on the AD2000 really expanded the sound and made them a lot more comfortable. I think a lot of pads could potentially fit on them.