Hello there,
It really doesn't matter how big or what '*K' a screen is, if your using Pixinsight or any other Pro editing package and you want accurate colours etc then
you really need a colour calibrated monitor.
I personally use an Asus ProArt 24" screen (PA248QJ) and a 'ColorMunki Display' to calibrate it. Absolutely beautiful screen, and, unlike 90%
of screens mainly designed for pro image editing, this one has a screen refresh rate of about 8ms so it's also super duper at gaming too which
is another of my hobbies. Some pro monitors refresh rate is 114ms which would completely die when gaming !
Mind you, if your playing in the region of 47" then you're going to need a large mortgage to get a Pro screen at that size if they even exist so that kind of kills
that conversation from the start does it not ? LOLOL
Anyway, take a look at this site and the links in the replies as it looks like it's right up your street and may help you get your head around the key features you
need to look out for in a UHD TV to make it really useful for image editing:
https://www.dpreview.com/forums/thread/3959551Remember also, if you find what your looking for in a TV then be aware that your graphics card will also play a big part in what you get on the screen. If
for example you had a TV capable of displaying 100% of the sRGB gamut but your graphics card can only output 70% of it then....You see the point ! Also,
the higher the resolution you output from the graphics card the bigger the possibility that colour accuracy may degrade as a side effect. Spend a bit of time
doing your research and your end result will be more satisfying.
Good Luck with your search
Paul