First let me say that after spending possibly too many hours over the years on Jaguar, BMW, and Porsche Forums, this is the most informative and enjoyable gathering of minds I have found. Going for a test drive Monday morning and there are two things I will have difficulty testing: How well does the car handle speed breakers (silent policemen for those with an Anglo bent), and propensity for wheel rash. The car looks fabulous with 19" shoes, but so much better with the dark turbine 21's, that the larger wheels will be an automatic for me. However, I had a really bad experience with a Jaguar XF with low profile tires, and do not want a repeat performance. I would love to hear experiences from those with 21" wheels.