Imo just go with A50s i have em and i can only hear the hissing when i turn up the Volum all the way UP turn it down 3 notches and i cant hear a single hiss
and that is already too loud they hurt my ears the Elite 800(the highest quality T.B wireless headsets with a 300usd price tag) are crap imo could have been good without all the hissing and comfort issues
in a nutshell your best bet for Wireless headsets are Gen2 A50s
Great build quality/good Quality audio/also very comfortable with great weight distribution even tho they are spouse to be on the heavy side i can wear the headset for as long as i want without sweating or feeling neck pain