+1 imho. That's also what most people comparing both at the Head-Fi meet today in London thought as well. Including several HE-500 owners. 2/3 are looking to upgrade soon to the LCD-2s, one doesn't have funds. No personal bias against the HE-500, they are great headphones too. Oh yeah and the HE-6 are something else properly amped. Now those are much more interesting topic I think. :)
The vegan pads version appears to have been a big hit with people too.
I thought the LCD-2.2 and HE-6s were on par with each other technically and the HE-500s weren't too far behind. But I preferred the LCD-2.2s over the two Hifiman headphones.