The best place would be at the top of CR at Calli Grill. They have an outdoor balcany where you turn to one side and it is just MK, you turn to the other side and it is the rest of WDW....AWESOME, plus the music for Wishes is piped through the restaurant so it is like you are there. We had eaten at Calli Grill in June and was able to go back up for the fireworkes (has ressies at 5:30 and fireworks were at 9pm), however, the bartender told us that you don't need ADRs to come up and sit down at the bar, so if you wanted to go up you can do so and just tell the people who check you in that you want to sit at the bar.