Get a newer E39 540. The X5's have 0 handeling and they are 3 series slow. with a 0-60 time of 7 seconds for the 4.4 compaired to 6.2 of the 540 you will notice the difference so much. But if shes looking for a good suv I guess BMW is one of the best you can buy. They do have the nicest interiors and options.