I've got a 65" Samsung QLED in the living room and a 55" LG Oled in the bedroom. I like them both and can't tell much difference in picture quality. The QLED is supposedly better for a brighter room and, as my living room has a huge window and gets the afternoon and evening sun, I think it maybe is a bit better for that.
I rarely watch TV in daylight so I don't really have to worry about getting a superbright screen.
My current set is a 40" one. The ones I am thinking of now are 48", which is about as big as I would want to go in my smallish room. That extra size would be quite nice though.
The Philips set comes with '
Ambilight'. (It has coloured LEDs on the back which react to what is on the screen and projects similar colours onto the wall. It is an interesting idea. I would have to try it to see for sure if I liked it, but I think that I would.) I will check reviews for the Philips and the LG, plus any others that come to my attention while saving for the new set.
Plan C for the old set is to loan it to a new home buyer in the family. She could use it until the picture problems started to annoy her, and at that point I could have it back and try to fix it. If I broke it then, fair enough - at least I tried! Replacement backlight LED strips cost £40+ in the UK but I could probably get them from China for about £25, which would make it worth a punt.