I have to say that I was in exactly the same position last year. I did have copies of IM and Killers on tape, so I wasnt sure whether to fork out for CD's. What swung it for me was the sale that Virgin were having - bought them for £7 or something silly. So you can atleast have the pleasure of knowing they didnt cost you too much. NPFTD is not exactly a must have, but as Mark says it will atleast complete the collection. Which is about the only reason I bought it, because I have very little intention of playing it in the near future.