Between the three....I'd opt for the 17-55mm f/2.8 IS USM lens, it has great reviews and is considered of "L" glass worthiness. I personally do not have this lens but haveread great reviewsand seen this lens used at a few weddings and baptisms.


The 17-55 is considered more of a portrait / landscape lens so I'm not sure how this lens will do for action shots as the focal length is not there, unless you plan on getting in real close to the action...


As for the 18-200 focal length, it all depends on your requirements. I would recommend looking into some "L" glass as your possible next purchase, but this is only my opinion and is to be taken with a grain of salt! [:P]


Hope this helps...