Trouble is you can't hear what they sound like unless you already have them. Like watching an ad for Flat Screen Super HDTV(or whatever they call that 4k res stuff) on your SD set. 
-MilesAhead
I've found that high-end stores will let you check the merchandise. BestBuy... not so much.
But that problem permeates so many different areas. Want to buy a phone? PSYCHE! You can't try it! (In many stores.) TVs are a different matter -- they always have display models showing something.
However, for those headphones, they're very good. Can you get better? Sure. But you'll pay a premium. You're going beyond the point of diminishing returns there.
For my headphones, I'd summarise them in 3 points:
- Great sound. Drop in some of your favourite tunes and just melt into the music.
- Very "light" feeling -- not like some that are "heavy" to wear. (The headband on top really helps.)
- The velvet earphone covers let you wear them forever.
About the only thing that I could really ask for is dual headphone inputs on both the right and left. The jack to plug the phones in is in the left headphone, but my computer is on my right side. Very minor issue, and probably a bit into the unreasonable area.
