It's a nice trip, a bit to wind but nice. Basse-terre to Montserrat then direct Grenada. You pass some great islands on the way, why go direct. You might not get 6 knots and you might be tired of the wind inching south. Why not go through St. Lucia and St. Vincent and the Grenadines. Stop off in Tobago Cays, Mayreau and Union Island. Where are you going in Grenada? Prickly Bay, St. Davids or St. Georges.
If you do go direct, you might consider squeezing over as close to Guadeloupe if you can. Then if the wind shifts, you have an extra 10 to 15 degrees to bear away and still get to destination.