Having been in the firework trade (Iused to make them and fire shows for a living), I would suggest that it might be a good idea to split the music to either half classical and then more modern upbeat towards the end of the display. This does tend to please a greater variety of people.
The 1812 has been done to death.
You might consider "Hooked on classics", a mix of famous classical but with a beat, similar is "Kimera and The Lost Opera", opera with a beat.
Upbeat dance music is good for the end, one suggestion for the last track being:
Healy & Amos - Stomp
Do you have the fireworks already sorted, if not I can recommend a company for you?