It seems the only difference of refurbished vs new is the fact that it was refurbished, lower price and might be not the best selection. I am talking about refurbished computers from Apple store. Can you buy refurbished computer from Apple and Apple care from let's say Amazon? Is it wort it? Can you tell the difference that it was refurbished- longevity vise and cosmetically speaking (as I understand it comes with everything as new computer)?