I am trying M43 for the third time. I have long been a Pentax user and have really enjoyed that system and their bodies. Over the last 5 years I have bought M43 systems twice. In past I have bought Panasonic bodies(GX1, G2,GH2,G5) . However, I never really liked shooting with them. They seemed cheaply made compared to my Pentax gear. I have decided to try Olympus EM10 and the 12-40mm pro. My intended use is for travel as I am getting a little weary of carrying my DSLR kit around the world. As I like the build quality of the Olympus kit, I would like to consider a second lens to add to my kit. I am wondering now which lens or lenses I should add to round out a travel kit. My thoughts is to carry no more than 3 lenses on a trip. I have considered the 14-150, 25mm, and 75-300. Should I be looking at other lenses too?