filter choices

I'm editing a one-hour doc with FCP3 and an IgniterRT Component (Uncompressed). I need to do quite a bit of black and white level adjustment, but not much with chroma. I have a lot of old black and white photos (both stills and AE animations), and some beautiful interviews shot on BetaSP don't need much work.



What factors go into deciding which RT effects filter is most appropriate for a given shot? It seems that the Color Correction 3-way, Brightness, Contrast, and Proc Amp filters could all do the job, if indeed they are all processing blacks and whites in essentially the same way.



Any wisdom about how these filters are different (other than the user interface) would be very helpful.



Thanks.



JW