Nice! I've got an '01 3.0i as well. It sounds like you've got a good plan to get everything dialed in.

Regarding rear shocks:
I had rear camber problems on mine when I first got it. Ended up replacing some rear suspension components to fix that. Main issue was the carrier ball joints. But my shocks are still original at all corners at 170k+ miles. When doing the rear suspension work, I found that the squeaking I had been hearing was entirely due to the rubber pads at the top and bottom of the spring. Removing all that, cleaning, greasing, and reassembling has made it silent again.

I've worked on many cars for many years, and this is one of those where it seems you really need to keep all systems running the way they should. The car is so (perhaps unnecessarily) complicated that little glitches here and there can cause problems and difficulty in diagnosing things.

For example, this site has multiple threads on cases where people get themselves locked out of their car (leading to expense, inconvenience, and other problems) because they only have one key, the battery in their key fob or car dies, and their driver's door lock mechanism (the only exterior mechanical lock) ALL fail at the same time. Well, not really at the same time, just that they did not think it was a problem until they were all dead at the same time. Most cars are not like this.

Keep everything in good shape and you'll be good.

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2001 X5 3.0i, 203k miles, AT, owned since 2014