I bought the LG 55" OLED E7N last year, would highly recommend.
The picture quality is stunning when watching progs
like Blue Planet II on BBC IPlayer in 4k UHD.
The E7N has a built in sound bar which has allowed me
me to de-clutter speakers and still have decent sound.
But you can get 2 other LG 55" OLED's £500 cheaper that
don't have the sound bar, the C7V and the B7V, all have
exactly the same picture quality.
(I think the C7V is exclusive to Curry's, a company that
I avoid)