Tank mates (mbuna)
 

Hurray, my 55 gallon tank is almost done cycling! This is exciting! I am looking to stock it in the next week or so. The fish I am looking at are (hopefully I can maintain the male/female ratios):

Labidochromis caeruleus ( 1 male, 3 females)
Pseudotropheus sp. "Acei" (1 male, 2 females)

What other Africans would work with these two species, the wife loves fish with rich coloration.

Thanks for your help!

With a 55 I would personally stay with the two species, and add a couple more females. I would do about 8 females total, and 2 males total. That will give you ten fish in a 55g which grow around 5inches plus.
I love my acei, he's a beauty but dear lord he grew fast. He use to be the smallest in the tank and now he is the 2nd largest.

But if you want another type I would suggest the Red Peacock or Orange Blossom. The red peacock's color is an reddish blue and the OB is bluish yellow.
I also like my Greshakei but his colors haven't really developed cause I think he's a sub male not one of the dominant ones.
I think a tank with the colors yellow, purple, and a red will really pop. Your decision though.

*Sorry didn't read your entire post*
Always up the females, with the Acei you should have 3 + females as well, so the male doesn't constantly harrass just the two.

Remember 1 male to 3 females... If you had 3 species of fish then you would have 3 males total and 9 females total... eh that would do in a 55, but I wouldn't go any further.