I think Anderson can still have 2-3 years at the top, he's very fit, doesn't play t20 or much odi cricket these days and the management have been very good at resting him when needed. The bigger worry for me is where the next Swann is coming from, Kerrigan showed the stocks are pretty bare at the moment although spinners tend to go on a hit longer than fast bowlers.
I'm not worried about Broad, he's still reasonably young and has been through a lot. He struggles for consistency but can produce match winning spells as he showed in that Durham test match. Rankin is a great find and I've been impressed with Mills at Essex from what I've seen, was bowling over 90mph. Agree about Finn, not sure he knows how he wants to bowl and is still troubled with his run up.
Going to be a cracking series. If Australia can keep Harris and Mitchell Johnson fit then they will seriously test out batting line up.
Wouldn't be surprised if it was a drawn series, 2-2 perhaps.