LOL, should've consulted Tp4-supr-ntellignce before hand.
Kekeke. yea bluetooth have anywhere between 60-150ms of lag.
The only headphones that don't have this problem use their own dongles. Like the Logitech gaming headphones, but the expensive versions are pretty jank. They're not really durable products.
Headphones however, is not a complicated device.
The way headphones work, is by moving a diaphragm identical to speakers. But because the diaphragm is right next to your ear, it doesn't have to move very much (fractions of a mm), So while it's very difficult and require exotic engineering to build a Low-Distortion, clean sounding SPEAKER (that moves maybe centimeters to inches), a $0.02 headphone diaphragm in a $35 headphone, is more or less identically performant as a $1 to $25 diaphragm in $5000 headphone, because there's no distortion, it doesn't move very much at all to produce 70-80db right next to your ear.
In the audio market, most of it is markup. The headphone has virtually no distortion outside of spatial distortion, which can be handled in software.
So, yea, buy a g535 or g435, call it a day, it's 99% as good as the Sennheiser HD800.
Most headphones marketed like HD800, like nike jordan sneakers, are in a class of Veblen goods. They're very generic low tech products, but made very expensive, because consumers on average are ignorant of the Physics of what's happening.
You look at a 98 Inch Tv with thousands of dimming zones, multichannel speaker, a whole damn computer built inside using Arm based pentonic chipsets that can process 4K 165hz, transform it 5-10 times before that even hits a refresh, backlight zone control, and that is only $1500.
And you look at your Speakers / Headphones which cost $1500. You open them up, some glue, a couple $1 speaker cones, The most expensive thing on it is the wooden box, very low tech, no 3D FEA modeling, nothn'.
The existence of such products, mark differences in HUMAN classification. The intelligence strata.