Please be advised that this is impossible for a hosting company to offer unlimited space or bandwidth. As a hosting companies servers have a bandwidth and disk space limit, their UNLIMITED offer is usually just an advertising ploy to get you to signup. Most of the time you will find buried deep in their terms of service contract something along the lines of: excessive CPU usage is grounds for account termination.
Knowing this will give you a better understanding on how these UNLIMITED hosting companies convince you that you get much more then what you pay for!