Photography is a 'suck it and see' subject...the key to successful images is practice and knowing your camera, and being able to assess the lighting conditions in front of you. Swapping camera goes part of the way to changing just one variable. At the moment I am using the Kx as my primary camera with the kit 18-55mm lens. I am attempting to learn and extract as much out of this combination as possible by photographing the same subject matter over and over until I have a full understanding of the camera and lens settings and mother natures lighting variations...and I am loving it! Fast action photography is challenging but I would exhaust your current cameras potential before paying out for another model of camera. Many throw money at the hobby in an attempt to achieve perfection while all the time the means to success was in their hands... sorry if I have suggested the obvious, just my own thoughts on the matter.