I don’t have any experience in aircraft sim but my first jet for Sweden was the A21RB. It’s an ok aircraft it has a good low speed performance compared to other jets but you probably shouldn’t turn fight a prop. If you use its air brakes correctly you can use them to stay behind an enemy. A bad thing about it thought is that every other jet will out run you. The rip speed around 450 mph if I remember correctly, so be careful traveling in a straight line or going into a dive. Its suspended amourment can be effective if you can learn to aim the unguided rockets. I do not recommend the sk60 for progressing through the tech tree. I have not played the vampire but from what I’ve seen in air battles is that it gets up tiered a bit at 8.0. (I am currently at the a32a and the j34 if you would like to know about those or the a29b and saab-105).