This reminds me of the discussion between RGB and CMY imaging about 15 years ago, at the time we added CMY and LCMY color combine modes to Maxim v2....but eventually RGB won out.
A good mathematical explanation of the pros/cons of CMY (aka subtractive filters) can be had here:
http://www.astrosurf.com/buil/us/cmy/cmy.htm
Mr. Buil's website is actually chock full of really good stuff, always a good read.
EB