I just got an email from the MetaX team saying they have just released a new update to the program that apparently tags and handles .mov files (mostly from Visual Hubs new 5.1 .mov format) in a much more stable fashion. My question to you guys is it OK to start encoding my 720p .mkvs using the .mov container? I want to keep the 5.1 surround sound, but will really only be using it on my AppleTV and MacBook Pro. Any disadvantages to using .mov in terms of quality? I'm just pumped that MetaX can now successfully tag these files, so if I can just get a thumbs up from you guys for the .mov container, then I'm going to start encoding in the .mov from VisualHub 5.1.