Hi, I'm thinking about getting a Phantom 3 Advanced. The case that DJI has seems pretty inexpensive, compared to what else I see online. Is it not very good? Also, I assume that I should stick with the batteries sold by DJI. Does anyone else make one? It looks like the charger that comes with the Advanced unit is 60W vs 100W for the Professional. Does this mean that the batteries take longer to charge with the lesser power unit?