If you want ISO playback, you can utilize this same set-up for the server side, and still have Plex for your streaming desires, but for the menu functionality you can either get a KDLinks media player (I think they run about $100 for just the player) or, if you have an HTPC, you can get DVDFab's media player. However, you'll soon figure out, as I did, that the extra size a full ISO takes up is not really worth the price of menu functionality (a 35GB disc can easily have just a 20GB movie file and space is money). Besides, if all you want to do is toggle between sound formats and subtitles, Plex, and any other media player, is fully capable of doing that. Now, if it's special features you want, menu functionality is pretty vital. Until someone gets a database out there with all the title information for each disc or a pretty damn awesome Java script analyzer (to match menu buttons to the particular video title), it's a damn pain to figure out and organize special feature titles.