Bike rack for A4 saloon

On my B6 I went for the Audi roof bars and Halford cheep bike racks. I preferred it since it kept the boot free to access and to be honest if it is noise or speed you are concerned about, I didn't feel/hear too much of a difference. The only concern was scratching the car getting the bike up in the first place, but I was careful.

Definately going roof mounted again on the avant.