Current Equipment: Nikon D90 Tokina 12-24mm AT-X 124 AF PRO DX Nikon 15-105mm VR Kit lens Nikon 50mm 1.8 D AF I'm looking for something for shooting mostly wildlife and kids. Examples: Deer Elk Animals at the zoo The occasional bird in a tree/nest Not a lion or grizzly bear at 1000m Kids at karate practice (indoors) Kids playing football (outdoors - daylight) Maybe some street photography where I can maintain some distance Other important factors: I'm not a professional and don't expect to ever get paid for my photos unless I stumble across Bigfoot while on a hike. The nikon 70-200 2.8 or any other PRO Nikon lens is out of the question with the exception of maybe a used 80-200 2.8 based on what I can afford. This all brings me to my initial conclusion that it's between the Nikon 70-300 VR 4.5-5.6 and the Sigma 70-200 2.8 HSM II Macro (non-OS version). Obviously the big differences between the two are: Weight (the Sigma is much heaver) Low light capability (2.8 on the Sigma) Range (an extra 100mm on the Nikon. However, I can address this with a teleconverter for the Sigma down the road). Price (probably $300 more for the Sigma). For my intended use, I'd like to know from anyone who has an opinion (especially if you have one or both lenses or do a lot of the types of shooting I mention above) on which one makes the most sense. Thanks.