I know the cameras mentioned are quite varied, but from looking at specs and other forum queries they seem to all have similar specs...ish.
I have been using a D5000 for a while now, for pleasure and for business however Im finding it to be hindering me as it is only an entry level, I mainly take shots for local businesses, local Authorities and Websites, but for fun I Love shooting Landscapes. Now the Video Capability is not a must for me but its always nice to have extra, don't have many lenses just a 50mm f1.8 and a 24mm f2.8, Now my main question is do I go for the D700 as it is more professional and thats what Im aiming for as a career, or do I go for the D300s/D7000 and invest in a new lens to go along side them?
Plus any advice on lenses for the d700?
What's hindering you with the D5000?
The D700 is obviously an awesome camera, I shoot with one and I love it. But Ruben above advises wisely about picking up some decent lenses as opposed to splashing out on a new camera body. For me, I upgraded to a D700 because I needed the low light capability, as I shoot a lot of low light/indoor events. I'd suggest you think about what is holding you back with your D5000 and perhaps you might be better spending money on lenses than camera body.