I prefer as many screens as I can have. I'm currently working with 2*24', in vertical (portrait) orientation. I have a 3rd 17' simply because I don't currently

I prefer as many screens as I can have. I'm currently working with 2*24', in vertical (portrait) orientation. I have a 3rd 17' simply because I don't currently want to spend money on a 3rd or 4th 24'. However I plan to soon. For me I find a problem much easier to handle if I can spread out all the supporting information - in my case HTML, CSS, JS, PY files + Chrome and documentation. The more screen real-estate I have, the better. Considering how much my time is worth, even a 1% increase in performance from a new screen makes it a no-brainer over a year. The same is probably true for you the reader. I don't need studies, I'm totally convinced. I'm also convinced that you need to get used to spreading your work out to get the full benefit.