WOW, how nice of you to take out some time, thank you! Really made my choice for me and saved me some $$$, Sargasso Sea here I come!
I have and use all three of these beautiful inks. I like each for different reasons; the Majestic Blue does have a really nice reddish undertones (I like to think they are undertones, not overpowering, but subtle), the Bilberry is a really beautiful Blueish-purple, very dark and wet. The Sargasso Sea, is a nice very darkish blue, with gold overtones (though they don't always show up on all papers). All three write pretty wet in my pens, and are a tad on the slower dry time. Any of these should fit the bill nicely I think.