Help with Theme Suggestion

I am working on my first blog.
My client’s vision for his blog is to begin with a basic text driven blog that will evolve over time into a full multimedia blog, including audio, video, etc
They even hope to have their own TV and radio channels at some point.
Since I am very new to blogging myself I am concerned that I may choose the wrong theme initially and then have to move to a different theme in a few months. Would prefer not to do that.
Is anyone able to offer a theme suggestion?
Any input will be appreciated.