Had my UK version 50PK590 for a few days now and loving it.
No dead or flashing pixels, and no buzzing unless my ear is within 30cm on a completely white screen.
Reflections are noticeable in daytime, but if I rotate the panel on its stand then I can lose any annoying reflections from a back window.
Just noticed on the back panel, there is an intermittent flashing green LED on the circuit board in the red circled area on pic below, and wondered if anyone knows what the flashing LED is for? I don't have any network attached.