I'm wanting to buy a food processor and my sister raves about her magimix but.....they're so expensive! Do they do anything a cheaper machine couldn't (or do it better)? Have never had a food processor before so a bit of a newbie when it comes to features - would want to do cakes / pastry / blending / curry pastes etc, not sure how important grating / chopping veg is but suppose slicing / julienne might be useful...any thoughts appreciated 