I use Maximums quite a lot, i find that when i'm at a servo filling up on Diesel i don't mind getting a maxiums, it helps keep me hydrated while driving.
I usually invest around $5
to answer your other question...
I generally like the Blue one most of the time, but at times the orange one is pretty cool as well.
i don't like the red one though
Blue and Orange in my opinion
What about you ?