Just something for you to think about even though a 150 is a nice size aquarium it's not going to be large enough to keep two breeding pairs. I'm assuming it's 6 feet long If you split the tank That's only going to give each pair 3 feet.
My advice to you would be to pick your favorite either trimac or motaguenses and focus on a single pair in that tank.
Both those species of fish are very aggressive and you may need to separate the male from the female. That's going to be impossible if you already have the tank split for two pairs.