Honestly Hustler, I think with a tank as big as yours and you being as new to the (sw) hobby as you are that you would be better off going FOWLR anyway. Filling a 300 gallon tank full of corals costs thousands of dollars and lots of time. If you really want corals too, why not set up a 3-4 ft tank and have a reasonably sized reef? Much more affordable.
There has been MANY a time when I have considered setting up a 300 gallon(ish) FOWLR, but never have I wanted a reef that big.