LiftThis 
2006 BMW 5 Series Sedan 550i 4dr Sedan (4.8L 8cyl 6M)
Worth the patience
 Ya know how you never buy a 1.0 release of software. Consider that for a car.  While the dealership was wonderful, and we would definitely buy a car from them again, it took several trips back and forth to the dealership to work out some of the bugs in the cars firmware.  Once that was fixed, WOW!  I love this car.  It's faster, handles better than my 2001 Porche 911 cabrio, and is quite the sleeper.  I have also driven a 2005 E55 Mercedes Benz AMG, and I will take my 550 any day.  The handling and braking are superb.  Most folks won't be disappointed in the acceleration either.  After a few M3s and Porsches, as a car lover, I can tell you that I love this car.