This trench-inspired dress from Marc by Marc Jacobs is perfect. It would be a great addition to any closet and would surely become one of those dresses that everytime you wear them people freak out and you get a ton of compliments. It's so successful because they've kept all the trench details where they should go, and only altered the cut so that it's more suited to be worn as a dress. You could probably wear it as a sleeveless jacket and no one would even bat en eyelash. Plus that safari trend keeps coming back every couple of years and the easiest way to get on the safari train is to wear something khaki (and it's on sale!).
Marc by Marc Jacobs Faille Sleeveless Mini Dress available at Saks.com.