before you go out and spend a fortune on high end lenses do some research. expensive does not always mean better.

one example is the sigma 70-200 APO lens. I have seen some amazing shots out of this one and it retails for <$200. make sure its the APO version though.

check out the canon and lens forums at dpreview.com there are literally tons of information there and always feel free to ask me and if i dont know it i will do my best to find you an answer.

also, if you check slickdeals on a semi-regular basis every once in a blue moon they post dell coupons that are valid for canon lenses.

good luck with your camera and post plenty of pics

tony