These are some I'd love to see made:
I love the whole dark green/forest green/whatever and white combo. There was a real set similar in another thread that I saw. The burgundy/wine and white I think would just look sexy and classy.
I love the cyan and grey combo, but got lost on what the mods would be.
And ever since I saw a lime green CODE button on a typewriter, I wanted a lime green and white or black mod set with white and lime green or black legends. It would also be fun to toss in a handful of lime green on black caps.