Upgrading photo equipment

I am contemplating replacing my Konica Minolta Z3 with something better. In
the past this camera has taken reasonable shots of static displays, but the
shots of flying aircraft have generally been mediocre, to say the least.

If anyone has any advice it would be much appreciated. A Nikon D80 with the
kit 18-55 and a 70-300 zoom lens would just about fit in my budget. Any
comments about what sort of results I might expect with that set up?

Thanks in advance

Cheers,

Indrek Aavisto


--
Criticism is easy; achievement is difficult. W.S. Churchill