well if you're aussie as you say, I believed they shot most of Thin REd Line in Australia, or at least in that region. stunningly beautiful film, I saw it twice in theaters and love my BluRay copy. You should look up the cast that didn't make the cut, guys like Gary Oldman, Mickey Rourke etc...I also read the book so I imagine the 6 hour cut is more of a straightforward telling of the events, just like the script. In the book and original 6 hour cut of the film, Adrien Brody's character is the main guy, but at the last second Malick thought Jim Caviezel's character gave the film it's spiritual tone he was looking for. Plus Malick always edits everything into more of a tone poem, so you never what will end up in the film.
That's the thing with Malick, the dude shoots miles and miles of film. So when I hear about a 5 hour cut of Tree of Life, I wonder how much of it is more of them staring at each other, at nature etc...
But I love the first half of Tree of Life, it's just once things settled into his teenage years, it really slowed down, but least it picked up steam and ended in a way that is more mysterious than the beginning.
Of course it's always cool to see Tree of Life in Austin since you recognize some of the locations featured in it, though I believe they shot it in Waco, Dallas and Houston as well.