What kind of guitar should I buy?

Right now I've got a George Washburn festival series acoustic guitar, that's about all I know. I don't like the style of the body at all, and I'm new to guitar so I can't describe what style it is, but I would prefer a different style. I don't like the tone that it has when I'm playing. Also the mike inside moves around a lot and makes an unpleasant tapping noise. The strings also rattle a little bit when I play. So what is a reasonably priced guitar with a good full sound?