Before heading to Italy, I spent a lot of time in various forums seeing if I could narrow my lens choices to just one lens. I would not have picked a 24mm f/1.4, but a photographer more talented then me has posted some compelling images.
I took the safe route and brought along a 24-70mm f/2.8, which I used a lot, and a 14-24mm f/2.8, which I barely touched. So, between the two, I would pick the 24-70mm in a heartbeat. The only time I felt that the 24-70mm was not long enough was when I stopped in Venice.
Nikon D800, Nikkor 24-70mm f/2.8G ED, ISO 800, 70mm, -1 EV, f/8, 1/6,400
Nikon D7000, Nikkor 18-200mm DX VR, ISO 400, 135mm, -0.3 EV, f/22, 1/1,000
I like the tighter composition and colors from the D7000. I could crop and photoshop the D800 photo to approximate the D7000 one, but that would be a waste of time. Both of these photos were taken at roughly the same location and time. If I were returning to Italy, I would bring the 28-300mm to see how it stacks up.