I am currently using a Nikon D50 with a 24-85mm f/2.8-4D AF Nikkor
Lens. One of my complains about this combination is the high ISO
(1600) pictures - they're too grainy.

If I had enough $$$ I would replace both, but since I have only
limited resource - I am trying to figure out which would give me more
bang-for-buck.

I'm looking at the 24-70mm AF-S Nikkor and also the D300 as
prospective candidates. Each run about $1,700-$1,800.

Suggestions?

- manzoor