yeah sorry guys. could have been a little clearer. the 27" for gaming the other two would be used more for University purposes running word and videos etc.
So you need to decide on what resolution you want for the main gaming screen as that will affect the gpu choice. At lower resolutions you don't need as much gpu as you would for 4K for example. The 2080 ti is more of a 4K or 1440p/3440 x 1440p high refresh rate gpu.