I love my magimix but to be honest I use my stick blender for most of the tasks you describe because it's just so much more convenient and frankly does a better job than the food processor - soups, baby food, and if I'm chopping I use a knife. But I use my magimix for other things the stick blender can't do, there's no other tool that can grate mountains of cheese or veg, identically slice 25 potatoes for dauphinois, make hummus and pastry in large quantities, crushing ice, that kind of thing.
What is it you want to do that you can't already do? Or is it just scaling up volumes?