I've played I think 8 Ritters in my time both 4&5 strings. ALL have played, felt and sounded amazing. If i had the money I would have no issue justifying the price as I know the effort that goes into these instruments and you can see the quality in the end result. If you are looking at £4000-5000 price range for a Ritter think, you could not get a new Fodera for that.
As for where I would use it, anywhere really. Maybe if i was in a really high quality tribute act I may think twice.