With the recent failure of the coolant expansion tank and our second kid being born in a few months, I want to get the car in top shape for my wife and take care of some of the common issues. The car is a 05 4.4i with 75k miles. This is what my mechanic is replacing,

water pump
radiator
lower radiator hose(upper changed already)
thermostat
alternator(old one has voltage issues)

He is going to check all the belts and change as needed. Anything else that should be checked out?

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03 M5
05 X5
01 RX300