One of the best places for sunset photos is by the infinity pool. Since you are a group of women, I would instead make my request for a 1 bedroom unit that has 2 bathrooms! Not all do, and that would make for a better stay than having the perfect sunset view. (Just a suggestion based on trips I take with friends!)
For an excellent dinner in a nice setting close to Divi, go to Antoines in Philipsburg. Make sure you have the dessert soufflé. Antoine's is very close and they have valet parking, which I'd recommend there at night. Otherwise, there are lots of choices in Simpson Bay, like SkipJacks for seafood.