Difficult to say. The 18/55 was all I took to Peru for a month this past summer and I came back with many excellent images and video footage as well. Would have loved to have a stabilized medium tele on that trip though, but to carry it is another matter. My priority is to have the most flexible, compact camera with the best image quality that I can get. The Sigma meets 2 of the criteria but misses the boat somewhat on flexibility. Once the dust settles on the 16/50 and if I can get the same image quality as the 16mm and kit lens on my 5N, I'll probably give it a try. Meanwhile, I'll continue to play with the 2 e-mounts that I have and legacy lenses that I have.