Its not really about the file format, its about the media player. Windows media player is sh!t. we all know it. it hasn't been updated in years, the fast-forward/rewind buttons don't work, the progress bar can't be dragged in real time, or at all for that matter.
I just really want to never have to use wmp... ever.
BTW, for those of you who care (there has to be a few others besides me), I tested it and I will be buying WMV player, not sure if I need pro, or not...