Panerai: Range rover- due to it's size, interesting and unique shape, and somewhat iffy repair record.
Rolex: BMW: they are ubiquitous, high resale value, good repair record, moderately priced
Omega: Audi: always fighting to get BMW sales and notoriety, but the product might be just as good. Plus they have them in lots of movies, just like Omega and Bond.
Seiko: Honda, relatively inexpensive, work great, etc...
Patek: Ferrari/lamborghini: whichever, expensive, gorgeous, a little fragile, costly to repair.
Lange: Bentley: a less sporty with less curb appeal, but damn nice!
AP: definitely porsche, now with bigger porsches being produced, just like the ROO, with the VERY classic Royal Oak being the 911 of watches.
Vacheron: Rolls Royce: great name, old company, but no particular models that have truly penetrated the market.