It depends on the amp but I've heard the 007 with the BHSE and some kind of DIY amp. I think it was a T2. Ideally I would like to hear a LL as well.
After the last few weeks I find that the HE6 has a better balance than the HD800 for my tastes so I haven't used it in some time and tbh don't really miss using it. Ofc this is with the Mjolnir amp but don't think another amp would be worth it since for the HD800 the Mjolnir is fairly on the cheap side compared to the other higher end amps by other companies. I could alternatively get the Stax setup without selling anything except my AD2k (I really need to sell those one day). It would just take a bit longer to save up for.