I knew I forgot something... they will be single layer with two channel AC3 sound. I tried using LPCM on a single layer aswell, but that meant going from a video bitrate of appox. 5200 kbps with AC3, to approx. 3800 kbps with LPCM. I did 3 pass CCE encodes for both of them, and the video's quality degradation was just too much. On top of that, my AC3 encoder gives such a good result, it's hardly worth any sacrifice.