Okay, I just discovered that iTunes is probably one of the greatest format conversion software available, free or licensed.

But, since I'm not tech-savvy, how do the quality of AAC vs. MP3 compare? Vs. WMA? I want to know because my AAC files take up about 2% more space than MP3s at 56kbps compression. But I did notice a significant jump in quality when recompressing from 128kbps MP3s to 56kbps AACs vs. 56kbps MP3s. This is so I can store about 10000-11000 songs on my iPod as opposed to just 3700. The sound quality doesn't dip that much and still sounds great in my car stereo when I use the iCarPlay Plus.

So any suggestions? In the future, if Apple _EVER_ decides to accept WMA, I might convery my files to WMA as well. But Apple hates WMA like Microsoft hates AAC. And neither are willing to accept the competitors' format. I know AAC was dull 5 years ago, but the quality has improved drastically, which is why I want some opinions.

So, any ideas?