Sounds good to me, but I don't know a whole lot on Malawi's. I do know that the lab's are more mild mannered than most other mbuna, so I personaly don't know how they would work out if the other tank mates are more aggresive.
Thanks Orion. I know the Yellow Labs and Yellow Tail Acei's are perfect for each other from what I've read, but I think the red zebras might be a problem.
I think you will be alright. My Red Zebras in the past havn't been to aggressive. And the other species should be able to hold their own. Just try and get them the same size abouts. And be sure you have hiding places like lots of rocks and such.