I'm going to have a long layover in sydney on my way to perth from LA. I'm looking for somewhere near the airport that I can eat for a decent price. Any travel advice would help as well. obviously I won't have a car so it has to be accessible to that contingent. Any other things I can do in the meantime would be interesting too. I have 2 layovers there so I'll need something to do. And while not nearly as important because I'll have a guide, what interesting places are in/around perth that I might want to visit?