Vegan pads transforms the sound the most of all the mods I have tried. The Vegan gives me much better image, blacker background, better and much fuller bass and last but not least lower high treble. In other word better and more organic sound. Second IMO is ohhgourami’s felt mod on the inside of the vegan pads. Made the bass a bit fuller and the overall sound more refined, especially the upper mids/lower treble. Then you have done those, then a re-grilling will provide a bit more open sound to ice the cake.