For an inline you could go with the CVA Buckhorn. You can get it with a scope, starter kit, or both for cheap. Then you have leftover money to get powder and all the other good stuff. I also know of some good traditionals for around $230 but that would not leave you much room for accessories. Muzzleloaders come in calibers from 32cal to 75cal and some are even larger. I would get a 50cal or 54cal. The 50cal should do you good. I like traditional rifles myself but some like moder styles. I like to be put back in the 1800's. Here are some pics of both.
http://www.cabelas.com/cabelas/en/templates/pod/horizontal-pod.jsp?_DARGS=/cabelas/en/common/catalog/pod-link.jsp_A&_DAV=MainCatcat20712-cat20815&rid=&indexId=cat20815&navActi on=push&masterpathid=&navCount=5&paren tType=index&parentId=cat20815&id=0027579