Who flies heavy spits? 
You missed the point. Weighting ordinance
hurts the Spitfires in this kind of lineup. Otherwise they would be even higher on the list. Read more carefully.
Anaxogoras,
I looking at that list I doubt you are weighting speed anywhere near enough.
Karnak, do you want to suggest modifier numbers? Here are the categories. Each one should be assigned a number above zero, decimals are ok, and they should add up to 22.
Speed at sea level
Best TAS below 10k ft
Best TAS above 10k ft
Climb at seal level
Climb at 10k ft
Climb at 15k ft
Turn rate
Turn radius
Turn radius with flaps
Primary lethality
Secondary lethality
Primary firing duration
Secondary firing duration
Primary muzzle velocity
Secondary muzzle velocity
Flight time
Ordinance
Roll rate
Cockpit visibility
Dive acceleration
Energy retention
Level acceleration 200-300mph