Swinksy is 100 percent correct. U would have to get AMD involved etc, with new machine sales, so Sydney or Newcastle would be the go, but Sydney definately first choice.
Melbourne would work if everyone put business first instead of personal gripes, but will it ever happen ? nope ! lol
WA is also a very smart idea because of the mining boom and people over there have heaps of money, so thats a great idea, if not the best idea if u get NIB Stern pinballs in attendance.