As much as I have had my bad weeks with my x5 (really the cooling system in my case)

All of the parts that you are describing didn't just "die" at 100K. I'm sure the CV boots showed signs of cracking awhile ago and everything else has been slowly deteriorating as well considering it is a 9 year old vehicle with a lot of softer materials..

Replace the parts and expect to get another 80-100k out of them. Next time, replace them before they go bad and you won't have so many bad feelings towards the X. If you haven't already- I would replace the water pump, and all of the hoses in the cooling system as they are one of the few pieces that will QUICKLY leave you stranded...trust me I know.