We've had the 24-70 f/2.8 L for about 5 years, and it is by far our favourite lens. It spends about 80% of the time on the camera, despite also having a selection of other lenses of various focal lengths between 15 and 200mm. Good choice!
A 16-35mm f/2.8L or 17-40mm f/4L would probably be a good partner for the 24-70 if you desire to go a bit wider and still have a zoom, depending on your budget.
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