Sooner or later you’ve sunk thousands of dollars into it.

Yep. Though I will argue that, at least for me, it's so, so worth it. Music is a gift that never stops giving. If there's one thing in my home that will ALWAYS put a smile on my face, it's my dac/amp stack and my favorite cans. That's priceless, imo. Very few other items that I own can do this.

Oh, didn't we all? I certainly did, and that with "cheap" stuff. I was not trying to go beyond mid-fi ever, mostly because i cannot justify it for my old ears, and still managed to sink quite a few grand.

Having this said, the purchases I consider best were actually cheapest: most enjoyment i got from a pair of Adam T5V as a desktop set up, cannot beat it at that price point in my view; and noname "sleeping headband" from Amazon, like 20 quid or so, that helped me listen to numerous audiobooks in bed with comfort. The latter one though is also the least sexy accessory you can probably get, so choose your spouse wisely! ) The court is still in session for the most recent purchase of Bathys to have OTG music. Sound quality is certainly there for a pair of wireless cans, just not sure yet about long term enjoyment and overall value for money.

k371s were my previous pair - and if it were not for their lousy snapping headband, I could certainly recommend it as well.