Any good stereo microphone setup should work well. When I worked for the Cleveland Orchestra I recorded the ending fireworks from the 1812 overture many times using the microphones suspended over the orchestra at the Blossom Music Center and they not only sound GREAT but you can actually hear both the explosion and the decay and the reverb. I have also recorded fireworks at our local 4th of July celebration with a RODE NT-4 and a portable CD recorder. I basically setup the microphone(s) at the outer edge of the crowd on a lightweight microphone stand and they sound not only realistic but with the crowd noise and the oohs and awes you can almost believe you were there.
Best of luck and let us know how it works.