We've just had a discussion about color mixing on Hype: http://hype.retroscene.org/blog/graphics/808.html - it's in Russian, please use google translate, it makes wonders nowadays.
I think that since there is no gigascreen blending on real hardware, then we should stick to choosing a proper blending for LCD monitors.
You can make a post on Spectrum Computing, I'm just a bit overloaded lately, it would take me some months before I open this discussion :)