idairyou
500+ Head-Fier
No I've not tried the suede pads.
I was ready to sell my HD800s because of the fit. After about an hour the only thing I would feel is pressure from the head band, and it would give me a headache.
After I got the ZMF suede pads and crescent strap, they get a lot more listening time on my HA-300B MKII.
I got the suede because Zach's measurements show only a slight change in the frequency response, and that is true. If you asked me to A/B the stock pads and Zach's pads I could not tell the difference.
The same for Zach's suede pads for the 600 series cans. The only 3rd party pads I have tried on my 650s' where I can't tell the difference from the stock pads.
The man is the Sennheiser pad whisperer.