Looking for an alternative, I've looked at, despite the negative opinions the 24-120 f4 and was absolutely thrilled by a few tests. It is very sharp, the AF is not as fast as at 24-70, but still fast enough in the everyday photographer who feel I find it very successful and the focal length range is absolutely great for everyday use. Despite aperture 4 can still indemnify good!
The only criticisms are the vignetting and distortion at 24mm for me. As this is, however, to resolve very well with image processing and it is not an architectural lens in the zoom, this does not matter for me.
Conclusion: great and suitable for everyday use focal length, very good feel, more accurate and faster, but no arrow faster AF as in 24-70 and a VR for static subjects, so that I can take pictures without shaking up about 1 / 10s. What more do you want ?? I am thrilled and so happy to be awarded 5 points.