1) The text doesn't just become smaller on a high res screen, it also becomes noticably sharper.
2) Considering that all the things you are planning to do are fairly visually intensive, it does make sense to go for a high res screen. It comes at a premium, but is def worth it. So go for it.
Thanks a lot man, "sharper" that is positive right? Also, do you have any idea if it would be "annoying" for my eyes to look at it, as it is a glossy screen? It might be a more personal question but yeah.