Hi cxr...


I would have to argue with IQ of the two lenses you have mentioned. The Canon 17-55 2.8 is pretty much a 'sheep in wolf's clothing'. The IQ of this lens rates at or above some L desginated lenses and is a highly sought after lens.


The 15-85 is a good everyday lens which Bryan has confirmed via review. I personally am not a fan of the 'double trombone' design, there is no word yet, if after use and over time, the lens barrel will begin to wobble and loosen. My 28-135 is a similar design and has long been sold!


I think there is no straight answer but possibly suggestions. How and what will you be photographing? Will you be taking photos after dark, sports photos, inside outside, budget constraints, wildlife.....I hope you see where I'm going with this....If you are taking photos of typical fauna or lakeside or children at play and maybe some wildlife, have a look at the 18-200 you end upgaining 115mm on the long end while sacrificing 3mm on the wide end.


Hope this helps.....[:$]