For $200, I'd hand them a secondhand Dusk or some other IEM instead. For $0, I'd just tell them to try oratory1990 EQ.

For the weebshit-tolerant, I use these test tracks among others to dissect a transducer's sound characteristics. I don't know whether I'd call the experience mind-blowing or life-changing, but I find it handy for separating the good from the meh.