First this belongs in the Oclub.
This is for AH general discussion.
Second, depends, how realistic do you want it?
Personally Lockon is perhaps too far over the curve.
When I printed out the Lockon Key commands it was 8 pages.
Try Wings Over Europe [cold war gone hot]
Several good jets including the f15, A10, & harrier.
A pretty good interface, and IMO easier to lock up a target & get a shot off before you have to break.