I'm looking to buy a new lens for my D80 that will give me better results for dusk/indoor sports shots.

I thought about the Nikkor 70-300mm f/4-5.6 VR but I have been told I need an f/2.8 or better to get the shots I'm looking for. (I currently have a Tamron 70-300mm which is fine but struggles in the late afternoon soccer games).

The Nikkor 80-200mm f/2.8 and Sigma 70-200 f/2.8 have been recommended. I'm looking for any input on these two lenses. I'm taking soccer photos so I'm curious if one will focus faster. Also, I would like the option to add a 1.4x teleconverter -- does one work better with one than the other?

I've also ordered the book Understanding Exposure and I hope to really dive in & play with the manual settings to see if I can do a better job than the sports mode I've used to date.

Thanks, once again......