Just Picked up a 2005 4.4l fully loaded X5! Need advice.

[cyanidecologne]

Alright so i just picked up my 2005 X5 and so far i love it. I picked it up a week and a half ago at 78,000 miles and im already at 80,000. The carfax report states that the BMW dealership it was at prior to going to auction performed the oil change at 77,500 miles however I do not want to rely on that information. I am planning on keeping this vehicle for roughly another 100k miles.

My question is what would you guys immediately do as far as preventative maintenance to help assure this thing keeps running strong? I was thinking Oil Change, Gear Oil change in both Difs, Water pump replacement, coolant flush. What else would you guys do.

Thanks, Nick