Why not look for a 3.0 X5 if you're worried about the heavy maintenance of the v8? Ashlin loves her 3.0 and they are cheaper than the v8's...atleast around here.
"Cassie"///Mpowered 93 318is 5speed (S/C'd 95 m3 swap)
2007 X5 3.0si (Wifes)
2001 330i DD