for war gaming, i may disagree with many or most comments as tbh you don't need or won't use 4k that is for sure, so don't spend the money
any modern cheap TV will do for most jobs,
i use a few monitors upto my biggest a 29" LED which is old by today's standard and only works at 75HZ and a max size of 1920x1080, but that's all i ever need so works fine for me
was thinking of buying this, but just for the price, not for the 4k part
Q3279VWFD8 32" 2560X1440 IPS 75HZ FREESYNC WIDESCREEN LED MONITOR made by AOC, so cheap as chips at just over £200
but i mainly use some old TV's to play war games on, all are wide screens and large TV's, LED for a 50HZ model, your looking at around again £200 for a 40" which runs games well at Resolution 1920 x 1080 pixels with a low 4ms, so plenty good enough, maybe not so for high end FPS, but war games, fine
so you don't have to spend a lot on a high end super fast monitor now days, unless your really into none war games, and have a high end pc and a silly money card in it, which will use it, most won't notice the difference,...