Which one performs the best? I currently have a mid 2012 Mac Mini base model(core i5) and thinking of getting the 13" Macbook Air to replace it as I might be given away my Mac Mini to a family member. I primarily use Photoshop, Lightroom and a few other softwares. I already have an external display which I can connect the Macbook Air. I wanted to know if performance wise, will this be a good move?