Dude, go for it. The difference in maint costs isn't that much. And most of the work is DIYable, if you are brave. i will suggest finding a good independent BMW mechanic and you will be fine. The E39 M5 is NOT a toy, it is a brute of a car in a fine business suit. Master it and you will be glad you did. Fair warning though, you will never be the same once you become a 'beast-master'. I LOVE my car and will NEVER sell it, no matter what.
BTW: contact kenny832 on this forum, he just switched from a ZHP to a beast!
2007 X5 3.0si Saph Blk/Tobacc Nap
2002 M5 LeMans Blau/Blk Heritage
X PIPE-SHARK INJECT
Last edited by Aijay's X5; 12-09-2010 at 06:27 PM.