Zoom lens for Nikon D600
I'm about to switch from my aging D80 to a D600. The D80 has a 18-135 lens, which has served me well. I also have an 80-400VR, which I rarely use, as well as a 12-24. Since most of my efforts are travel-related, I'm wondering which lens would be give me a comparably broad range for the D600. I'm aware of the longer zooms available and am tempted to give up the 80-400VR since I never take it on trips. All suggestions greatly appreciated.