Not when you are David. He will become the Chuck Norris of headphones.
What does a headphone think after it get bought?
"I hope the buyer is David, as I heard the takes you to the headphone paradise!"
When audio stores run out of stock they ask David for more headphones.
When a good pair of headphone appears on the market people think " Let's ask David, I am sure he already has it somewhere there! "
When a big headphone manufacturer decides on a new better pair of headphones, they ask Davids' permission before putting it out on the market.
David doesn't listen to headphones, the headphones listen to him.
Davids collection of headphones reached infinity, twice!
Aside from the jokes, I think you can make a comparison between your own headphones, if you have an organised mind and had a lot of time with them. Not saying it wouldn't be subjective, but when you listen that much to that many headphones, you actually may get closer to objectivity .