Just wondering what you guys thought of the differences between music encoded at 64 kbps using WMA, and 128 kbps using the Mp3 format. I cannot tell a difference in sound quality between the two. I do like the fact that the WMA file is about 40% smaller in size, recognized by Winamp, and can be compiled into an audio cd using Nero, just like Mp3. Any negatives(besides being created by Microsoft)?