Thanks guys, all very helpful...
Travis: What makes them harder to keep? This is the first I've been told of that. Are they as hard to keep as Tropheus? I devote alot of time to my fish, and I take pride in doing the research neccessary on whatever I am keeping to make sure I do right by them. Thats why I was not going to put Malawi mbuna in the 55. I am going to put them in a much larger system. I thought the 55 would be better suited to the smallish Lake Tang/Lake Vic fish.
Triazole: Thanks much for the links! Thats what I was looking for.
Cindy: I've been looking around. I love the Malawi mbuna due to their colors, they are beautiful fish, and I have only seen a few from the other lakes that I like as much, and if my attention is not being held I am afraid I will neglect their tank. I really want sexually dimorphic species to get a variety of color, my desired stocking list would include some dark bronze/brown/blackish fish, some solid yellow/orange fish, and something with a striped pattern like the Julidochromis... . I really like Neolamprologus, or Lepidiolamprologus. Can they be housed together in system like mine? What would be the requirements? I plan on having alot of rock, with a sandy bottom and a few plants like Valisneria with the roots protected by the rocks to guard against diggers. Will they eat plants like Java fern, or Java Moss? As far as Lake Vic species go, I love the Astatotilapia, and the Lake Vic Haplochrimines are gorgeous looking fish... Pundamilia (spelling?) are beautiful too, but like I said, finding these fish for sale is hard around here< and I am not sure of compatability.
Thanks guys