I'd rather have a 1945 Soviet La-7. More finesse with one of the best prop fighters ever.
I mean, sure, the F-15 could shoot missiles at me from miles away, but with the La-7's turning ability, they wouldn't be bad to avoid (they can be shaken by modern jet fights, La-7 can outmaneuver any of em)
Only draw back is trying to punch through the armor with 20mm cannon shells. Sure, it sound big, but not that great against steel. And its max speed is about 700 km/h.
God, I've been playing to much IL2:FB. If there is such a thing as 'too much' IL2.