All in all, your list doesn't look bad...congrats!!!
I would be prepared to add additional circulation to the tank, especially if you ever plan to keep SPS corals.
The skimmers you currently have listed will likely not be enough to handle a fully stocked tank of that size, so be sure to consider some higher powered options before commiting to anything. (Beckett injected skimmers work great on larger tanks; I have one on my 300g and it skims like crazy!).
All of the lighting you listed has the potential to heat up the tank, so depending on your climate, a chiller may be necessary (probably in the 1/2HP-3/4HP range). FWIW, I'm in the Chicago area, my tank is lit by 3x400W MH w/o any actinics installed in a well-ventilated in-wall setup and my heaters have NEVER run, but my 1/3HP chiller has been running for about 8-10 hours a day this summer anytime the room temp goes above about 78 degrees.
Best of luck, and be sure to plan, plan, and then plan some more! You'll appreciate the tank that much more later on when you have to maintain it (water changes, algae scraping, feeding, moving corals, etc.).