http://www.nikonchat.com/nikkor-70-210-af/

What zoom lens would be better on a d5000?
I’m looking at 3 right now. Not sure of how far I’d like to go with distance, but bear with me. There’s the 55-200mm VR Af-S lens, and that’s about $210.00. The 55-300mm VR AF-S lens and that’s about $330.00. Last is the 70-300mm AF Nikkor SLR Camera Lens. I’m sure the 70-300 doesn’t have VR or autofocus, but it does run for $120.00. Which would be best for a d5000?
The 70-300mm AF doesn’t have an internal autofocus motor and won’t autofocus on your D5000. The only 70-300mm that does, is the 70-300mm AF-S VR, and that runs about $500.
The 55-200mm is very compact and gives you a nice extension over your kit lens. The 55-300mm give you a longer reach, but is a larger lens.
Here’s a couple of reviews for you.
55-200mm AF-S VR:
http://www.kenrockwell.com/nikon/55-200mm-vr.htm
And the 55-300mm AF-S VR:
http://www.kenrockwell.com/nikon/55-300mm.htm
And finally, the 70-300mm AF-S VR:
http://www.kenrockwell.com/nikon/70-300-vr.htm
Only you can decide if the price and size difference work for you. Bring your D5000 into a camera shop and see how your camera handles with each lens.
BTW, here’s a refurbished 70-300mm AF-S VR for $349.95.
http://www.adorama.com/NK70300AFVRR.html
What’s In My Camera Bag? PART 2 (See Description)