I've been playing with different resolutions. With 600x480 and 800x600, you can see a plane's attitude about 1.2k out. Trouble is, the radar is a mess at those resolutions. In the 600x480 resolution, you cant see the names from vox transmitions.
It also seems the plane display is larger than the target area at low reolutions, so you see tracers going through planes with no hits when in the 200-400 yard area. In ther 600-800 yard area, its actually easier to get hits at low resolutions, but of course the bullets aren't too affective from that range.