Honestly, this is something you’ve got to watch the prices check for deals. They do have some good ones around “Cyber Monday,” and “Tax Day”here in the US. It’s far better to keep an eye on the costs year round. Also, take advantage of “Open Box” deals at places like, best buy, frys’ electronics, etc. Good Luck!
Do a cost to performance chart as well.
Say you’ve got a GTX 1050Ti it’s a poor investment to get a 27″ 2k 144hz monitor with such an “Entry-Grade” graphics card.
Same as if you’ve got a GTX 1080 Ti and you’re buying a 1920×1080 60hz screen that’s “Underbuying the Video” that card is good enough to run most games at 4k 60FPS. I run 2k 144Hz (2560×1440 144Hz) with it since going back to 60 FPS was underwhelming I like to be above 90 FPS now.
Hope that helps a bit!