I am a Canon shooter so it is easier to recommend the bodies I am familiar with but Nikon makes some really good bodies too including the D7000 nikon d7000| B&H Photo Video and other similar bodies. Sony has some really cool new bodies out too as well as you may want to look at the new mirrorless cameras from Sony (NEX series) and Nikon (Nikon 1 Series) with my leaning would be toward the Sony. The Sony NEX5n is on my short list. sony nex 5n| B&H Photo Video
Take a look at these and see what questions come up and I will be happy to help answer them if I can.