There's really not much out there to do this. Probably half the programs that claim to do it are scams of some sort or another, virtually all the rest are vastly overpriced. And every time you convert from one format to another, there's an inevitable loss of quality. WMA doesn't really have any quality to spare, so this probably isn't the greatest of ideas.
While not the most convenient solution, you might find it better to just listen to the WMA files using something like VLC Player.
I am happily now a mac user..I have gotten more fed up with microsoft after each OS "improvement" since win 95.
I do have one problem I could use help with... I lost all my belongings in a house fire and only have survived wma files backed up...I need a way to reformat them for itunes format..I am not having much luck on my own..
MAC rules..I love the OS