Just an Idea, but because the German broadcast were about 17gb in size, adding any more bitrate to them to fill a BD-25 would be pointless. But why not drop the bitrate slightly so each episode comes to about 14-15GB with audio and you could to 2 BD-50 - one for each trilogy with 3 films on each. You really won't see a difference in quality between a 15gb & a 17GB version and this could be a great way to present them as 2 trilogies