I agree, if the product you received was in crap condition (obvious wear and tear) then you should complain. The product should be in "like new" condition -- whether it is a refurb or whether it's a brand new product. If there are obvious dings and scratches, on your $3000 monitor, you should contact Apple.

What I'm saying is that Apple is within their rights to send refurbished products (or, heck, replace the parts in yours) for replacement warranty products -- read the warranty statement. These replacement parts need to be in "like new" condition, though -- if not, you should have it addressed.