Wildcatsare1
Headphoneus Supremus
The Grado OEM pads have multiple densities of foam in them... for example, the part that sits against your head is the densest. The Ear Zonk are all the same density. I've had both... I much prefer the Grado OEMs... worth the extra price... but I also prefer even more whatever pad size your Grado headphones come with (some folks buy a different size pad to for example make their PS500 look like a PS1000... impresses friends but I don't think it sounds as good. Grado chooses their pad size as part of their overall headphone design).
@kayandjohn you definitely have much more Grado experience than I do, but I absolutely love the G-Pads with my 500e's. I care less how they look or who they impress, sonically they are outstanding. I do lust after your collection though...PS1000's would be a nice gesture too a new Gradoite...