So I´m on the lookout for a new monitor and of course it would have to be optimal for Factorio

So what I am wondering is if any of you guys have experiences on how Factorio handles monitors with weird aspect ratios and very high resolutions such as 21:9 3440 x 1440
Also, how does the game work with monitors that display higher than 60Hz refresh rate? (such as 100 or 144Hz)