I'm leaving soon for a European river cruise. I have an OMD and the following lenses: 12-50 f3.5-6.3 12-35 f2.8 75 f1.8 17 f1.8 25 f1.4 9-18 f4-5.6 75-300 f4.8-6.7 I don't want to take ALL my lenses - would like to pare it down to 3 or 4. I'll be visiting museums & churches, as well as walking around cities, and floating on a river. Suggestion(s) as to which lens to use when will also be very helpful. And if you prefer one lens over another that I have, I'd be interested in your reasoning. I'm thinking I'll take the 12-35, the 9-18, and the 75-300. I like the 12-50 because of its weather-sealing, and its macro function. I also like the 75 because of its f1.8, and the25 for the f1.4. Decisions...decisions. Thanks for your suggestions.