I encoded two of the same movies "Enemy at the Gate". Here's the settings I used for both movies: -Apple TV Preset -H.264 -2-Pass Encoding -Turbo first Pass -Audio 192 Kbps or AAC + AC3 Except One is -2500 Bit rate while the other is 70% Constant quality. Now the Constant quality movie file size is 2.20 gigs. The 2500 Bit rate is 2.80 gigs. I honestly cannot tell the difference between these two files when watching them and making side by side comparisons. Did any of you do this before and stuck with one over the other? I want to know what you all are doing. The 2500 might have better picture but I think it's just darker more than anything. Other than that they both look identical.