Well having flown ALL hangar 9 warbirds... I will rate them by ease of flight:

1, Thunderbolt (best overall everything)
2, Mustang (Really good, but some people don't like the covering, original version retracts weren't all that great but the revised retracts are really good)
3, Corsair (Flying Very easy, landing, hella tricky)
4, Texan (Ahh the short midget wobly retracts will cause you to rub your wing tips on the ground)
5, P-40 (Landing is hard, noses over easily)