Can any one reccomend me a large microwave oven, easy to clean and energy efficient & also safe. also what type should be bought (i.e stainless steel) which's outer casing/ door does nt get hot (current one i own is a stainless steel Sharp one, its door and outer casing gets hot. this is dangerous with children around.- the manual booklet says this is not a manufacturers defect, it comes like that)