Hi,
Last year I was asking myself the same question and in the end decided for a 29" curved 21:9 ultrawide with 2560x1080. So no 4K here but like using two 1280x1080 panels side by side. Limits the impact on performance and resolution-wise it’s more than adequate. Maximum refresh rate is 75hz. I see no advantage in 144hz since MSFS will run at 30 to 60 fps.