Apart from the obvious difference in the type of format (WAV or MP3) the main difference is the quality of the finished product. The 192 MP3's are better than CD quality and are more than good enough to listen to or use in a set but 320 MP3's contain much more of the high and low frequencies that may be lost on a big sound system. Finally, if you want to original files, with the original quality, with no compression applied to them, go for the WAV.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.