I recently got a Digital rebel xti... and am searching for what probally doesnt exist...... i want a nice telephoto zoom lens at an affordable price. I would love to get a cannon L-series.. but im not really interested in the price. I have read reviews on both the tamron and quantaray 75-300mm lenses.. and they sound ok for the money. Does anyone have any information on this, and/or could anyone direct me to as site that has good information on lens reviews?? Thanks.