Starting out, I can recommend the Nikon D90 or the Nikon D5000.
Have a think about what you want from the camera and how much you want to spend, that will influence your camera choice.
Also, very importantly, go to a local shop and physically handle the camera, or camera's, you are considering. You need to be sure that any camera you buy "feels" good to you.
Also consider, in your budget, other items you may want to buy, e.g. camera bag, filters, spare battery, memory cards, etc.
Come back here with a budget and your requirements and the TP members will help you spend your money wisely.