Yes, when I fly buffs I worry the most about P47's. But then, I don't fly the strato-buffs, I typically fly at or below 20k. I don't worry all that much about the German planes because you have to get within 300 yards to hit reliably with the cannons. Spits don't bother me because they are, as someone said earlier, slow. P47's do seem to take an inordinate amount of damage before you kill them (at least from a buffs POV, I can kill them OK in fighters). I worry about N1K2s because they have 4 cannons that can hit you out to 700 or so, thats sort of a scary feeling when they can come dead up your 6 and get you half the time.