X5 High Mileage Problems?

[BrockWed]

Hi, I finally narrowed my search for a new car down to the X5 and I'm looking at 2001-2004's in either a 4.4 or 4.6. My budget is around 17,500-25,000 although I dont really want to spend 25,000. With that budget and those engines I'm looking at cars with anywhere from 60,000 miles to about 85,000 and im just wondering what kind of problems could set my bank account back. The cars are all in good condition but is there any pricy repairs coming up? I was previously looking at A6's and around 90,000 miles you have to replace water pump, timing belt, ect... and that was about a $1,400 fix. This will be my daily driver. Thanks for your help.