As far as I can tell, apart from the 1 megapixel difference, these 2 cameras are exactly the same spec. I am new to digital photography, but want a good camera that's going to last me a while. Is 5MP a huge improvement over 4MP? I can pick up the G3 for £450, but it's at least another £100 to fork out for the G5. If anyone has these cameras let me know what you think of them.