My wife got me the "small" Oklahoma Joe's smoker from Academy last month ($299 model)... very pleased with the build quality... thick walls, cast iron grates, good damper control and I've made some GREAT food on it.
That said, it's good for one large brisket or a few racks of ribs. Suits me fine, as I seldom cook for more than 10 or so people, but if you plan on entertaining a big crew, you probably want the next size up.