I'm on my third pair of these; bought my first pair when I got my first recording studio gig in 1988 and have relied on them ever since. Come to think of it, they're one of the only consistent pieces of playback kit I've owned (gave up the 813s and NS-10s years ago in favor of ADAM Audio, but have not changed out my cans). In short: they work best when powered by something Class A and with balls. I've used them in the vocal booth, monitoring while recording, referencing mixes, and just for casual listening. Very little fatigue after long sessions, and built like a tank. $55 bucks is totally reasonable.