Since i don't need or want to own a car in the foreseeable future (rental car once in a while is more than enough), i'd definitely go for the watch!
Edit: I haven't been in the WIS-game long enough to get a good overview over that price-range. But being German, i quite like the A Lange & Soehne offers...the Langematik looks especially fantastic. So that'd be my spontaneous choce :)