Looking forward to the 24-70 and a trip out to Mt Adams this weekend. I find the 16-35 too wide and rarely use it. Do you tend to use your 24-70 more than the 16-35 for landscapes? I would like to know.
The ZA 16-35 is my most favourite lens. Definition is great on this lens and distortion is well under control. Superb for landscapes or architectural subjects at either end of it's zoom range. In fact as a travel kit with the 70-300 I can easily "lose" the 24-70. As they say horses for courses or one man's meat etc!