I'm about to redo my PB in original Giallo Fly with a full strip down and disassembly, original paint is tired and lightly spider cracked. If done right, in my opinion there is little to match it, though I admit to being very partial to silver as I was lucky to grow up with a 72 GTS that my father ordered and picked up original at the factory without black hoods.
PPG would be the other.
House of colors makes choice near impossible for sure as just about all palettes are super inviting!
Cheers and best of luck, it's a gorgeous car.