the NEW one. New best plane . . .
It depends on you.
Annoyance factor, choose something like the chaika or the oscar. If you like doing turn n burn, zero, or spit/seafire
if you like boom n zoom p-47 or p-38, or the raiden
Gunnery wise, do like chipping away with .50 cals or you can land 30mm cannons and one hit wonder something with the p-39?
Also depends on the quirks of certain planes. For example, the Corsair is great but if you go below a certain speed, it handles funny and your gun accuracy drops . . .
I'm more of a cannon person, so most uS inventory I can hang and fly with but . . .