Alright I asked a few questions about monitors already, so I was advised that 1440p 25" should look close to retina for my 2016 rMB m5. I am thinking a Dell u2515h as they are discounted because I believe the are updating the line soon so I could get a good deal on one. My question is: is the 1440p compared to retina the right info? Will it look as close? Any lag between the rMB and the monitor? I will be using the monitor with the MacBook open as a dual screen set up (monitor to the left or right of the rMB screen). Just need some added screen real estate and I don't need or want to drop a ton of money on an ultra wide or 4k if I don't need it. I also am choosing dell because of the vesa mount so I can use a monitor arm with it.