Again, thanks to you, because you gave me the info of the 1080p 32MP58HQ, and for 200$ I tought: ok I take the risk to do it by myself. When I received it, I started with the help of a friend to deframe all the screen without success (unfortunately, LCD panel/backlight/motherboard of the screen didn't fit in the original 720p case). So I decided to remount the screen and place the monitor in his original state (without foot) in the main Vewlix black frame, without the glass.
I think I have some pics of my first try, I'll look for them.
So, for all those who want to upgrade their screens, both LG mentioned in this topic can be replaced without any technical/electronic skills.
Yours is freesync, mine gsync. Now that Nvidia supports both, there won't be any difference So yes, order it, and put it inside. If you need any help, I'm guide you. Just buy 2mm black isolation tape, and that's it You'll from 720 to 1440... it's quite impressive32GK850F-B). Not sure what the difference is but the frame is the same down to the RGB so it’s another option for the poorer people like me