For sound package, it's gotta be Rocket Money by Barcrest. This was an old £10 machine before my time but have played on the emulator. Sound effects appear pretty seamless to me.
Best music would be JPM's Firecracker, yes, the other fireworks-themed machine lol
"I think you're going to go away with a lot of money."
Bubble and streak - when all spoons had sound turned off on machines - but JP was on a different setting and ALWAYS played. Class when it repeated 3 or 4 times and barstaff didnt have a clue what was going on.....