I am thinking of getting my first iPad to accompany my Mac. I do some fairly heavy photoshop work and would like to explore the possibilities of using an iPad occasionally either as a tablet with sidecar or stand-alone for retouching, dodge and burn etc. As this is a bit of an experiment I am thinking to get the basic model and then upgrade later if I like it and need the extra power/screen inches. Is this realistic or is it going to struggle with my 40 mp images?