 Just purchased my 2007 X3 with 24100 miles on it a little over a week ago.  This is the best handling SUV I have driven.  Lots of power from the 3.0L straight 6.  Very comfortable seats.  Stereo sound quality is excellent.  Much better than my '04 330ci convertible.  I tried the sport package on another X3 and the ride was too rough for my taste.  The aesthetic updates for '07 look great.  Bluetooth is not always clear, but works okay.  Also, the throttle tip-in is a little touchy and takes some getting used to at low speed.  I was looking for a small SUV that was fun to drive, this fits the bill nicely.  The Japanese companies can't compete with German build quality, ride and handling