Buy yourself a drink. Write a kind letter.
I had a horrible experience with a G3 iBook that was really just a lemon. Apple eventually replaced it, kindly enough, with a nice, rather loaded G4 iBook. I soon noticed that my replacement iBook had a single stuck, blue pixel.
Of course, one stuck or dead pixel is really going to be unnoticeable unless you're watching a ton of letter-boxed noir movies or doing similar video/graphics work. Which you may.
Still, I wrote a very, very nice letter to Apple Corporate describing my issue and how upset I was.
They replied promptly and offered to replace my iBook (which I declined, because at that point I was "over it") and sent me a very, very nice gift as a "token".
So, have a drink, don't stress yourself about it, and, if you're up for it, write a really nice, eloquent, empathetic letter about how upset you are that one of your favorite new possessions just isn't perfect.
Cheers,
N.