Hi!
I'm considering getting a new monitor - 240hz seems to be the best at the moment (though 1080p max resolution possible on the market for the refresh rate)
Or should I stick to a 144hz option and perhaps get a 2k monitor for the same price? My graphics card can't run 2K at 144fps though…
Completely subjective and depends what you use it for and if your computer can output at that refresh rate. Majority of people are still perfectly happy with 1080p 60 FPS.
Alternatively, some people would rather have a higher resolution than 1080p. Depends on your preference.