Actually, for a tool that is for UML, Enterprise Architect is pretty flexible and  can be used for more than just Class Diagrams and such. It has BPMN diagrams, Data Models, Use Cases, Requirements and more.

Disclosure: the company I work for now has an agreement with Sparx for re-selling and training, but I myself have been working with it for a few months now, and I can honestly say I would recommend for BA work anyway. If you have any questions about EA, let me know.

I am based in SA so I am not to sure if training is an option. I have spoken to a Sparx sales comp here but the training is a little expensive. Are there any other options that you can recommend?

I pretty much agree with 'K'. The one thing that the EA training also gives you is an introduction to UML itself. If you need training on UML to start with, then combining it with EA training could actually be more cost-effective than two separate courses. Also, Iconix has a book on developing systems using EA with their methodology. It starts after Requirements definition, but could still be some help.

And yes, South Africa is bit out or range for my company, based in North America, but stranger things have happened. In the meantime, keep coming back here if you have questions.

Dave