Well I finally did it. I returned my "ultimate" 15-inch MBP for the "ultimate" 17-inch MBP. I exchanged my 15" MBP once and had a "perfect" one. However, after thinking about it for a week I decided that I had to have the 17", hires, LED screen. I called my local Apple store today and as luck would have it they had them in stock! I ended up paying the restocking fee and the difference in price between the two laptops. So far so good. This screen is great, however I do notice the LED backlights at the bottom, but only when it boots up with the grey screen or when I use a solid white background...which is never. If I have any background it is not noticeable at all. No yellowing, no hum from either speaker. I think I will stop looking for defects now and just enjoy my new toy. I bought Aperture and Final Cut Express and ready to start photo and video editing! By the way, my screen is a 9C7A which I have not seen anywhere yet...Enjoy your toys!