d70s speedboats lens

[great adventure]

hi every body,

I am just new member here, and I've just bought the nikon d70s

with 18 - 70dx ednikon zoom lens, and I am planing to buy nikon

zoom lens like 70 - 200 for action, water sports and formula 1

races. and as I read that the 200 mm will be 300 mm in digital world.

i am a good photographer but with the old 35m film camera

as i used to have dynax 7000i with 35 - 105 zoom and

100 - 300 mm zoome lens

so what do you recommend. also what is the difference between

vr zoom lens and dx-ed and which one is better for sports



thank you

ga