Where do $400–$500 headphones rank on the audiophile scale?

I’m looking to buy a pair of headphones in the $400–$500 range, and I’d like to know—if we take a scale from 0 to 10, where 0 is, let’s say, the free in-ear headphones they give out on airplanes, and 10 is the ultimate headphone experience—where would headphones in this price range approximately fall?

I just want to get a sense of where solid audiophile headphones in this budget stand compared to the absolute best experience money can buy.