As others have pointed out, there is zero point in spending big on headphones when you really don’t know what you even like yet. Just get a mid-level pair that has been around for a while and is well-regarded. And then, and this is important, spend a good amount of time with them to figure out what you like and don’t like about them.

You might now know it sometimes, but the best way to avoid constant upgrade urges is to just enjoy what you have, what you’re listening to. Trying to try everything and only ever using the same thing, neither are great approaches.

If that doesn’t get you there you can always sell one of your ears. You have two.