Which tele lens do you guys use? I'm looking at this Sigma lense.
http://www.sigma4less.com/sess/utn;jsessionid=1544596fd915c68/shopdata/0020_Lenses/0010_Zoom/0040_Tele+Zoom/product_details.shopscript?article=0210_Sigma%2B70-200mm%2Bf%3D26slash%3D3B2%3D252E8%2BEX%2BDG%2BAPO%2BHSM%2Bfor%2BCanon%2BAF%2B%3D28SG70200F28DCA%3D29
Here is a great link to lense reviews also.
http://www.fredmiranda.com/reviews/