Pads have a huge impact on the signature. Just about any of the full size can pads will fit. You might have to make an adapter.
I've tried K240 pads of various iterations, J$ Denon pads, Koss pads, T20v2 pads, O2 pads, and W11JPN pads. The W11JPN pads were my favorites for comfort and SQ. The Denon, K240, O2, T20s, and W11s are all withing a couple mm of each other diameter wise so one pad adapter can be used with a few of the best pads. Beyer pads are probably 5mm-7mm smaller OD so they won't fit on the same adapter and bigger pads slip off a Beyer sized adapter.
I put a little how-to on the pad adapters in the ortho thread many moons ago, use Ludoo's search engine to find the post to get started making your own adapters if you don't want to tape them directly to the bezels.