Ciao Malbertoo, thnx for answer, so it is not huge difference with icore 3 with icore 5? At present I am a owner ipad air 2(which i wish sell for now), but its screen is not compatible with a thin stylus, (Adonit, wacom ISC2), and it is practically impossible to draw anything. At this moment I am looking for an alternative, I thought surface pro 3, good enough to draw at least in the store today, I tried to do a couple of lines in the firmware, the responsiveness of the pen and less straight lines surprised me compared to the ipad, but not know how to behave adobe illustrator or corel painter, where there will be many layers will be enough CPU power? 4Gb ram should be enough in my opinion, you have had the experience, what do you say?
The i3 will do it, however there is always room for improvement. The i5 will do it better, and the i7 even better. It depends on how much lag you can handle.