Hello The Apple rep at the store where I work(military base) says that Apple has not shipped the new 27in iMacs Quad core yet. They have received the new 21in iMac but I do not want that because it is only Core 2 Duo and and I do not like the 256 GPU, I want to get the 27in with the Quad Core and 512 GPU. I will use it for graphic design, animation, music production. The store still has the old 27in with the Nvidia GForce 120. Is this a good machine? Is the 21in worth it? Should I wait? The rep says he heard something about the screens being bad already in them and Apple doesn't want to ship them until they are working correctly. Anyone know anything?