Welcome to the board!
First of all, I thank you for the service you have done for the country. My heart goes out to each and every service man and woman in our military. Saddens my heart to hear of any of them killed or injured in the line of duty.
So, you found this to be an addictive hobby? Welcome to the club!
As for the live rock, if you are still cycling, simply adding a few peices of LR now will seed your other rocks and over time, they will become live. Perfect time to do it too! Perhaps your LFS can sell you a small peice from a display tank with lots of coralline algae on it. Put it in your tank in an area of high water flow and give it a gentle brushing with a toothbrush a few times a week. Befor eyou know it, you'll have coralline everywhere!
As for what else you need, YOu did not mention lighting or water flow (powerheads).
You will want a total of it least 10 times tank volume in water turnover (900 GPH in total water flow). 15 to 20 tiems is even better. Multiple smaller powerheads is better than a few big ones too. Good, random currents is what you are aiming for.
You will need adequate lighting for a reef. For what type of lighting, you have to determine what types of corals you will eventually want. If you are happy with soft corals, then PC would be fine. If you think someday you want to advance to stony corals, anemones, or clams then go with VHO or MH right now. I hate this rule, but aim for around 5 watts of lighting per gallon (~450 watts total).
Another thing you will want to do is research, research, research! Learn as much as you can about any creature you want to buy BEFORE you get it. Know it's lighiting requirements, feeding habits, compatability, adult size, ect. A good place to start is here on the boards. Another is a book called "the conscientious marine aquarist" by Bob Fenner. I have known him for a while and he is a wonderful source of information.
Your filters are fine for your tank now.
Sounds like you are on your way to a wonderful system! Any more questions, just ask!
Again, welcome to the boards!!