In my experience of replacing the pads on the T60, there is no sound improvement.
The headphones sound best for me when they are close to the ear.
I tested the ZMF Ori Lambskin - comfortable, boosts the bass, (a thick collar closes all 8 holes in the partition) at the expense of other frequencies, Impressive, but if you like this sound, you just need to buy a HyperyX Cloud and it will be better and cheaper.
Dekoni velor - It's just an improvement in comfort, sound degradation, maybe a little better bass.
Hybrid Brainwavz - better than Dekoni, but still not.
Old pads from the Denon D2000 turned out to be interesting and promising. I ordered new original ones for the Fostex TH610.
The T60s sound great on the narrow T50rp mk3 pads, only the stage closer and goes into the head, not forward. Well, comfort drops, you know.
So for now, the original pads remain.
I have tried more mods to open the 3 holes inside the cups. I have the impression that after opening, there is chaos in the scene and location.
Thick pads also require more power from the amplifier. While the T50rp mk3 sounded quite tolerable on the Mojo, the T60rp ZMF Lambskin Mojo did not make it (loud, but unpleasant)
At the moment I'm a bit disappointed with the T60 I prefer the T50rp mk3 despite the rough high frequencies.
However, he does not give up. I am waiting for the tH610 pads and are planning an additional amplifier for Mojo.
My aim is max 450 euro maybe Monoprise THX AAA 887? Do you know better suggestions for this price? GL