I would agree with from an aesthetic level however I've been burned many times over the years with roof mounted options -
1. I have had hydraulic brake lines from disc brakes leak on the roof - ruining paint.
2. My wife isn't all that tall and has had issues getting the bikes on/off the roof
3. I have had all manner of aero bars, fork mount, etc and the all suck for aerodynamics and gas milage.
I guess I'm just feeling burned as I didn't look hard enough when buying - dealer told me the bumper mount was the same as the EU models and clearly its not