Which headset? I only own the Hybrids for the HD800SDR mod. All i can say is.. stick with the stock pads. One of the secrets of the HD800 is the ear being positioned within the driver 'chamber' it gives you that sound depth and impact. With these Dekoni pads, because they're so padded, it removes your ear from that sweet spot and the sound becomes thin and distant, not to mention no bass response at all.
Not sure about the HD700 or PC37X, but Stick with stock when it comes to the HD800