Thanks for all the input and help! When it comes to the tank don't worry, I know whats what, I've had a few large tanks (125, 150 & 225) and kept many large species including arowana and rays. I usually stuck with oddballs but recently started to take a liking (with some assistance from my girlfriend) to africans. I'm currently living at my parents while finishing my degree but when I am finished in a year I'm sure I will have another 125+ gallon tank. And as cant009 mentioned, worst case scenario I could find a great home for the large cichlids and replace them. My questions were more directed to the cichlids as I'm new in this area.
I did have another question for you guys .. My electric blue cichlid (ahli?) has now settled in comfortably and is running my tank. He has pretty aggressive toward all other fish today. I've heard that more africans helps with this problem as it distributes the aggression? Is there any truth to this? If so will removing my silver dollars and adding another cichlid or two help make my tank healthier, aggression wise?
p.s. .. dedicated my day off today to the tank. Scrapped the driftwood and plant decorations. Went for a drive and picked out some slate rock. Designed my tank with this rock which gives them more hiding spaces and a more natural feel. I'll post up a picture tomorrow!