I gave up on my marine set up because I had one very aggressive angel fish who just would not share his space with ANY newcomers. The only other fish he tolerated was the Tomato Clown I and think that's only because they were introduced to the tank on the same day. So I was doing all that work with a 40 gallon tank for two fish.
Funny thing is they both ate out of my hand and I just couldn't bring myself to get rid of them. It was hard enough when we decided to take the tank down. I took them both to the fish store and sold them back to the guy I bought them from . I'm sure someone has some nice fish. I had them for 8 years!