whxm3 have really good review everywhere but i read somewhere it could lag when watching video.
Have you pulled the trigger on a solution yet?
Since your bluetooth source is a Sony, you might find my experience noteworthy, here -> https://www.avsforum.com/forum/378-h...l#post58730242. Posts 3 and 4 cut to the chase. The tl;dr = A reddit regarding latency in a XM3/A9G environment allayed my preoccupation with Aptx Low Latency, spurred me to pull the trigger on some XM3 baby brothers, and I'm satisfied with the A/V sync in my all-Sony environment.