It's all so cofusing... I like to shoot motocross and wildlife images and can't decide on the best way to go. Advice would be great. Thanks I have a D200 & D90
Sigma 120-400mm f/4.5-5.6 DG OS HSM (Nikon Mount) @ £570
Nikon 70-300mm f/4.5-5.6G AF-S VR NIKKOR @ £380.00
Sigma 70-200mm F2.8 II EX MACRO HSM (Nikon Mount) @ £580
If your budget would reach, I would recommend getting 2 lenses, one for wildlife one for motorsport.

Which 300+ should I go for?
120-300 Sigma?