click here for Linux Mint
click here for SimplyMEPIS
click here for Ubuntu or Kubuntu if you prefer a more Windows like environment.
click here for PCLinuxOS 2007 - 2009 is not yet out of beta, so stay clear unless you are prepared to experiment.
All of those will run "live" and all will give you an office suite.
Media is a little less straight forward and revolves around licensing issues. Just as you would have to buy something like Power DVD to run DVD's in Windows, you need to download and install codecs to do the same job in Linux. Not as complicated as it sounds and if you need further help on that, just ask. Audio will work "out of the box".