Fishboy, I responded to your other thread. It might be a better idea to just use one thread so others can follow your questions and answers. I'll refrain from answering in the other since this seems to have garnered more responses.
I second the idea to check out aqadvisor. Good site to get some ideas. Personally though, I feel like you can safely add more based on your filtration and maintenance schedule, as windelov said.