Hi,
If you wanted to get a lot of small fish for your tank, I would suggest getting a small school of green chromis. I was never too taken with them before, but I have two of them in my 55 with a false perc clown and a recently added coral beauty and the tank is great.
The green chromis are super laid back and swim/school all over your tank. I never thought they were too much to look at compared to other fish, but after having some, I have a hard time seeing me having my tank without a few of them. My two green's follow my clown around too, like he's in their school. The coral beauty just ignores them all and eats his algae.
Green Chromis do seem to grow fast too. We bought 2 really small ones two weeks ago, and they have more than doubled in size already! Anyway, good luck with your setup!