Peter Bordeaux 
2016 BMW X6 SUV xDrive35i 4dr SUV AWD (3.0L 6cyl Turbo 8A)
This car over delivered
 We have owned (4) prior BMWs (1 325IS and (3) Z4s) the latest was a 2013 Z4.  Loved the roadsters but needed something more practical yet sporty.  The 2016 X6 was the ticket.  We looked closely at the X4 but it was an odd size and would no meet our needs.  The X6 has plenty of headroom, front and rear seats.  It rides exceptionally well and is incredibly smooth.  It is very agile for its size, trust me I know agile having (3) Z4s and this car is agile.  It moves well, has excellent, smooth acceleration when you need it and is a pleasure to drive.  We have the 35is motor and in my opinion is all you need.  We have been to the mountains with a load for two people and had no trouble so I wouldn't recommend the 8 cylinder and the extra fuel consumption that goes with it.  My wife was worried that she would miss her roadster and she has said now numerous times that she loves her X6, loves how it looks and drives.  The only gripe we have I that it is a little tricky to get in and out of since it does not have a upper handle but not a big problem and you get used to it.  Everything else about this car has been outstanding and far better than I thought it woud be.  Also,  we get constant comments on how nice of a car it is from neighbors, friends and strangers so that is fun.  We own the white X that does not have the M body but has the aluminum running boards.  Hope this is helpful for you if you are considering this vehicle.