Camera Lenses for the Nikon D5000?

I'm getting the Nikon D5000 and I want to know which lenses I should buy for these settings- Theatres/Auditoriums and Football stadiums/gymnasiums. I know I need something bigger than a 55-200mm, can you help me?
Also, does anyone suggest where I might find this camera and accessories at a reasonable price?

Can't give you a place to get the camera, sicne i don't knwo what country your in.
http://www.amazon.co.uk/...0012X61U2/
this is a good, 70 - 300mm lens. I don't know how much you have for a lens. There's one with VR (image stabilisation) which is about 30% more expensive.

You can consider Nikon 70-300mm f/4.5-5.6G ED IF AF-S VR Zoom Nikkor Lens
Pleasing Bokeh
Fast Auto-Focus (when working properly)
Vignetting is minimal
Image Stabilization (VR)
Flare is minimal
1.5x factor (105-450mm) makes for nice zoom
Colors are very good
http://www.amazon.com/...B000HJPK2C
http://rover.ebay.com/...m270.l1313
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