My experience with different scaling options is poor. At work, I want to run my laptop 15" screen which is 1920x1080 at 125%, but want my dual 23" monitors which are 1920x1080 to run 100%. But whenever I choose different options, outlook and citrix receiver look like crap on either the laptop or monitors. I can only keep it clear when all are same DPI setting. And Citrix receiver is mangled on anything other than 100%. So, I am running my 15" display at 1920x1080 at 100%. It looks fantastic, albeit a bit small.