I like this thread very much (Borat voice)

1. 300DD
2. EcoTech Radion Pros, prolly would need 3 for that tank
3. I do not like DSBs unless they are remote because you can bring them offline if you see anything bad happening
4. I have a Bulk Reef Supply 5 stage RODI system that has been great so far, I would find the white food grade containers for that much water, or a few Brute garbage cans
5. You can make the plumbing yourself, a mix of spaflex and PVC is what I would do
6. 2 VorTech MP60's, when you combine their wireless pumps and lights you can recreate thunderstorms, I am all about recreating nature, so that is what I would do.
7. Biggest you can afford/have room for, the more water, the more stable the system. I would prolly use a big tub from tractor supply, well I guess two, one for the sump, the other for the fuge
8. The more money you spend initially, the less you will want to replace things that you wish you would not have bough at first
9. I would have the skimmer in the sump, could get a really nice Reef Octopus Diablo or something.