When you buy bluetooth headphones, you basically buy three things in one. A DAC, an amp, and the headphones (well, the dynamic drivers, mostly) themselves. Cramming all this in headphones and selling it all as a package means you’ll never get good bluetooth headphones unless you pay the price of a good DAC, a good amp, and a good pair of headphones… in one shot. And you’ll also have to pay for the R&D that was required to cram all of this in one pair of wireless headphones too. So, even if you pay 500$ for bluetooth headphones, they definitely won’t sound like 500$ headphones. And you still won’t be able to use the DAC and the amp for anything else. And obviously, if you don’t like the DAC or the amp in your bluetooth headphones, you can’t change these (well… good luck lol).
My opinion? If you’re considering bluetooth headphones, you’re already losing cash. If you absolutely need to go wireless for portability, well, chances are, you already have decent headphones you like, and would take everywhere if you could, but you “can’t” because they’re not bluetooth. But you can: Just buy a portable, bluetooth DAC+amp like the FiiO BTR3 (75$?) or the EarStudio ES100 (100$?). But these little thingys with AptX HD/LDAC/etc., promising “hi-res audio wireless” or whatever, probably won’t even give you wireless CD-quality via bluetooth. Because, it depends on your source too. And bluetooth quality varies depending on where you are and how much interference there is. More info here:
The Topping D10 (DAC) is 100$USD (or less, even). JDS Labs Atom (amp) is 100$USD. Both are often recommended here when someone wants an “inexpensive but high quality” DAC and amp. That’s basically the minimum. 200$ for a good Dac/Amp combo with no options whatsoever (Topping D10 doesn’t even have an on/off switch). If you want that sound in a 200$ pair of bluetooth headphones… it won’t include the headphones. Chances are, you’ll get way better sound quality with the good equipment you already have, plus a 20$ Mpow bluetooth 4.2 adapter, than with 200$ bluetooth headphones. And if it’s not the case… a 20$ mistake is better than a 200$ mistake. And you won’t have to throw away the headphones you already have.