The German season 4 set is widescreen. However, fullscreen is definitely the way to go. The amount of editing continuity goofs I noticed outside the 4:3 frame was simply awful.
I've never heard anything about the UK releases not having the original music. Can you point me to specific examples? All I can say is that I certainly didn't notice any changes when watching the DVDs. And you'd think any replacements would be very easy to spot since pretty much everything that...