I'm a fan of buying new goods but then, it's mostly because I want to be the one to peel off the wrapper
My laptop isn't new and it's serving me well. But then, I don't expect it to serve me as long as a new one would.
Refurbished goods are good and can save you some cash, especially when you have your sights on expensive gadgets like a mac book.
Otherwise, I would recommend you go for new products. They've got warranty on them and (should) serve you better and longer