Appreciate all the feedback. At this point I'm not sure what to do. I found a 4.8is I like in the upper 20s with no warranty. I also found a 4.6is in the low 20s with CPO warranty. Thoughts?? I previously owned a 2002 M5 which did not have a warranty. I never had any big problems with the car. I've heard X5s are not as reliable though.