Richard Snow , Jul 26, 2011; 05:40 p.m.
I'm not sure which store you contacted, but for landscapes I'm not sure you would benefit from the 70-300mm VR. I do think the 11-16 + 17-55 is a great kit for most landscape photographers. Personally I rarely go wider than 35mm, but I don't shoot landscapes very often.
I will admit that last weekend I shot a series of photos for a panoramic landscape and used my 70-200mm at 105mm and 135mm f/8 and f/11 for the hour I was shooting. (evening shot, tripod, waiting for the perfect light balance of skylight and city lights).
Personally I'd go with the 17-55 if you already have the 11-16.