Nick, D700 at airshows will blow unless you use it simply for Static Wides or interior cabin shots. For the action, even a crop sensor with 500mm on target can leave you a little short, especially with the new [unwritten] rules to stay away from the crowd :-( Some venues like Andrews can actually be worse during construction as they will use a farther runway! UGH! ...and get the D300s rather than the D300 if you can... it has a bit of video (crappy but there) and a slightly improved UI/Firmware...