I just obtained both FilmPack and Silver EFX within the last week. So far they're appear to be pretty comparable, I like the results I'm getting with each. FilmPack has the advantage of emulating a lot of colour films as well as B&W. I also like that you can adjust the grain resolution to emulate camera originals shot on 35mm, MF, or LF cameras. You can download a full-feature 30-day free trial of FilmPack from DxO and try it yourself. They currently are offering special pricing of about $129. For Nik, at only $149 for the full Nik plug-in bundle I wouldn't balk at fact that you have to get the whole set, Silver Efex used to more than that all by itself.
