Will be going on a trip soon to Japan with two young kids so I am debating what to bring and whether it is worth acquiring an RX10. I already have EM5 and can bring 14-150mm and maybe one additional prime. I think we will be spending a lot of time indoors in museums, etc. Cost to me = $0. Or I'm considering getting an RX10 specifically for use on this trip and future trips. The RX10 has come down in price and I could avoid changing lenses. Cost = $800. I have the Oly 12-40mm PRO lens but don't want to bring it because it does not have enough reach. Thoughts? Alternatives?