Bc2000 (for the BCF2000 & BCR2000)

hi.

i am thinking of picking up a midi controller for software (audition) 
but i am torn between the bcf and the bcr.

by the looks of it, it seems there are more options that you could do 
with the bcr because they have 24 knobs as compared to the 8 faders.  
the question i have is, can you have assigned functions on faders, 
knobs and button and then by the press of a button have a whole new 
set of functions...so on and so forth.

if this is possible, then the additional knobs is not really an issue 
because you can have multiple presets each time you press a button to 
change them.

anyone know?