Congrats on the cream puff buy!
That's about the mileage I got my 2003 4.4i in 2014.
If there are no records of what has been done, I too am a fan of tranny fluid total drain and flush (I drained and flushed my fluid about 4X to insure all the converter fluid was clean and new).
Other than fluids, engine oil, differentials, xfer case and cooling, most of the hoses and belts might be good to near 90K, IMHO. Spark Plugs? Fuel filter?
Then near that 90-100K mileage cooling system hoses, water pump thermostat, fan clutch and suspension and CV joints are the things that I preemptively change to give me high reliability.
Good Luck with your new to you E53!
Mike