Best Nikon lens for high school sports (basketball, football, etc)?

I have a 18-55mm 18-55mm f/3.5-5.6 Nikon Lens and the 55-135mm. Which would work best for high school sports on my Nikon D80? Mainly basketball. Also, if there are any better lenses, please, do tell!
Thank you!

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What is the difference between a 55-200 mm VR and a 55-300 mm VR DSLR lens?

I'm looking at cameras for my boyfriend and can't decide which to go with - mainly because I don't know much about them. Right now I'm choosing between the Nikon 3100 18-55 mm VR + 55-300 mm VR, and the Nikon D5000 18-55 mm VR + 55-200 mm VR. He isn't by any means a professional photographer, but we're looking for something that will give us a crisp picture and that has a good zoom.

I know that usually the bulk of the cost is concerning which lens you buy. In this case, the cost is only a difference of $150. How much better is the 55-300 than the 55-200? I'm sure its worth the $150, but I'm just wondering what exactly the difference is between these two. I plan to visit a camera shop later this week, but in the mean time I'm just looking for some opinions concerning this. Thanks!

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Imovie 11 won't export nikon d3100 into 1080p?

I got a new macbook pro in january after having a regular macbook before that. My nikon d3100 would always export in 1080p. For some reason on my new computer, it'll only export in 720p.suggestions?

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