On the upside, you get the other benefits of an SLR in a compact package. The G1's 12.1-megapixel image sensor, though smaller than most SLR's, is about six times as large as a high-end point-and-shoot's. Bigger sensors absorb more light to capture richer details and colors, especially in dim settings. And the ability to change lenses lets you shoot anything from extreme close-ups to wide shots to a warped fish-eye view. Best of all, you'll finally have room to pack all those lenses in your bag.