No question there are some compromises with the 20"... and everyone has different likes and opinions. Frankly, I don't like the looks of big wheels with low profile tires on most vehicles. For me, what I liked was the look of the wider wheel stance on the X5 and not how tall the wheels are: 10x20 front & 11x20 rear. The 19" are 9x19 and the 18" are 8.5x18.
2011 X5 xDrive35d Black Sapphire/Oyster
Packages: Premium; Technology; Sport Activity Activity; Convienence; Rear Climate