For those that are wondering what are ideal travel lenses, having just returned from three weeks in South America, I can safely say the 17-40 f/4L and 70-200 f/4L are a perfect combinations on a crop body.
For landscapes, I found the 17-40 to be ideal. If needed extra focal length (eg for my sunset shots) the 70-200 provided the range I needed, and I found I didn't need the 40-70mm range. The only problem is that I had to stand quite far back for portraits with the 70-200 (the 17-40 is not good for portraits). If you can afford it the 17-55 might be a useful replacement for the 17-55 in terms of range.
And both lenses are not too bulky on the 350.
You could argue the 10-22 would be a better choice but (1) you get too much distortion and (2) it's not long enough for all purpose landscape work.
My photos are on my website at http://www.geocities.com/george9t8/pbc_photos.html![]()
George





