Maybe we need a conditional box of chocolates category.  User assumes all risk and responsibility for whatever shows up at their door.  Then we'll include that video of the Beyer QC chick measuring only one channel with a one second tone and boxing it up GTG!

Pretty much this. I’ve heard great sounding DT 1350s, DT 250-250s, K550s, and UE6000s. I’ve also heard pairs of each of these that have sounded like absolute schiit. All four of these fall under the "Box of Chocolate" category IMO. (I've heard one very good UE 6000, and three awful ones. I bought a hardwired demo model UE6000 last week off eBay for $20. After listening to them, I'd have rather used the money for 2x KSC-75s.)

The closed headphone category is just full of headphones with product variance, poor price-to-performance ratios, fit problems, and questionable build quality. I really like the CAL, the M-80, and the MDR-1R at their going prices though.