i think the best for 55" was during 9.9 sales on Lazada, around 3.4K for 2 years warranty, and 3.9K for 2+3 years warranty.
too bad i missed the ship, hopefully can get the same price during the upcoming 11.11 sales.

there is an issue with my x80h (unsure if this is an issue or this was how it designed)

I have connected the tv to an external speaker via headphone output/aux port, and the sound will be directed automatically to the external speaker.

But the problem is, the sound will always comes out from the external speaker. Meaning to say, as long as the aux port remains connected, I can never switch the speaker to use either built-in or external, even I have the options to select to do the switch.