How about loss of resolution? 2.76:1 would yield an effective resolution of 695 x 1920, using just over half of the horizontal resolution, compared with 753 x 1920 for 2.55:1, a gain of 58 lines, which may not seem like much, but in terms of overall pixel increase in the image, it's a 1.3 megapixel image versus 1.4 MP approximately, for an actual gain in resolution of 111, 360 pixels or 8% resolution. That may not seem like much, but when you consider that an SD DVD image only contains 345, 600 pixels, it puts it into perspective. Go take a look at the American Widescreen Museum's articles about the various incarnations of Ben-Hur and you'll find that what RAH is saying is borne out. All 35mm prints of Ben-Hur were printed @ 2.55:1 anamorphic with slightly thicker framelines to preserve that AR. Then, when Warner released its first DVD of Ben-Hur, they took one of these reduction prints and reframed it to 2.76:1 to appease the OAR purists, thus losing valuable information at the top and bottom of the frame. I'm not saying that's going to happen again (Warner's QC on classics is much better than that now), but looking for a specific AR at the risk of losing image quality simply because you want to see everything in the frame seems a little too Super35 to me.