Tyll recommended the 800S over the 800, I'm not sure what you're saying there.
Tyll also said:
"On the other hand, [the HD 800 S] does have that little bit of distortion in the bass and if somebody is going to be EQ-ing it, I don't know. Its a tough one and I might take a stock HD 800 over a stock HD 800 S if I was going to use EQ on it all the time. So in a pro setting, you might still go that way and just tune out that 6kHz resonance with an equalizer although that doesnt work as well as the modifications-- the Super DuPont modification."