The Panasonic Lumix DMC GH3 is a very good camera, among the best tested by DxO Mark in this format. It is small and light and will make an excellent camera to travel with and fulfils all of the requirements that a serious enthusiast is likely to have. However, it is pricey for a hybrid and it has competition from several directions. The Olympus is even smaller and lighter and scores slightly higher but it does lack a viewfinder. For a similar price you could be buying either the Pentax K 01 or the K-5 IIs, both of which have scores consistently higher than the Lumix but obviously with the overhead of a bulkier and heavier piece of equipment to carry. You could also be looking at the Sony NEX-6 which is the closest technically, scores better and is cheaper. There is no escaping from the conclusion that the Panasonic Lumix DCM GH3 is going to be the ideal camera for some people, but for others the better choice would be some more detailed research.