My squadron uses an AIM-9M mod. Other than the navigation stuff, avionics upgrades aren't really going to offer as much in the Sim. The jet is still limited to payload weight due to thrust rating. If you fly it with centerline 275 gal and 2 Mike's you've got yourself a formidable little adversary. Because it's not FBW, and doesn't have a g-limiter like the hornet, you can actually fly extremely good BFM 1v1 against almost anything including SU-27 family. It lacks the thrust needed for vertical BFM maneuvers but in the horizontal this jet is really sweet.