I chose the Assassin. It is a gravity fed smoker with four 23.5 x 23.5 shelves and it comes with a BBQ Guru. This gives you a lot of capacity and it is right in your budget including shipping.
Mine should be arriving in a couple of weeks. Here is a link to their site:
http://www.assassin-smokers.com/site...rs.com%2F#2729