We looked for 4 months to find a car that is:
Big on the inside and small on the outside.
Has lots of power but gets good gas mileage.
Is fun to drive but rides smoothly on bumpy streets.
Has really comfortable seats for 4 adults.
We drove a dozen cars and almost thought that the car we wanted did not exist. Discovering the Diesel engine was our breakthrough. We could get an upscale car that gets great MPGs.
The Audi Q5 had a much smoother ride than the diesel X3 BMW we tried and a much better driving feel than the MB GLK.
The only real downside of the Q5 was the price, but we are quite happy with our choice so far.