i tried the filters with a DSLR for BnW and know quite a bit about the colour complimentary... like i know red would help with bringing out the details and contrast when dealing with skies and landscapes... i agree that filters gives you quite a added point on details side but maybe it might just kill or something else in the same picture...
double edge sword i guess.. gotta know very well what you like, or what you're looking at...
can't wait to get the tank and stuff then i'll start fully out with BnW