I bought a refurbished Macbook which should be coming Monday. I'm reading online that the screens were updated recently, and I'm betting that my refurbished machine doesn't have it. Because of the iPod promotion and my education discount, I can get a newer machine for around the same price with additional hassle. Should I return my refurbished machine? If so, how do I go about it? Can I just take it into an Apple store and pay the difference?