I think white is a cool colour to get, but you must be prepared to care for it a bit more than black or the other darker colours. Apart from cleaning dirt and oils off so it doesn't yellow or stain, you need to take care not to nick or scratch it, because then those marks are much more obvious on a white surface and can also trap dirt.
But I wouldn't worry about yellowing due to exposure to sunlight. Not like you are leaving it out in direct sunlight for hours everyday like some piece of garden furniture.