>>All of my CDs have been ripped to the wma format.
Mistake #1 (Off With His Head!)
>> I plan on using files in the mp3 format.
>> Should I convert all of my files?
Never!!!! (Slap, Slap)
>> Which has the best sound quality?
APE (Has No Loss In Quality At All, But very Large)
Short On Disk Space? And Want To Stick With MP3. Use MP3 VBR With A Setting Of High.
MP3 VBR With A Setting Of High Will Render Very High Quality From 160kbps to 320kbps and since it knows where to use more data and when not to it will save room on the old hard drive.
The MPC and OGG (Another VBR Format) formats are not widely supported and are not good choices because of that, but they do sound good.
MP3Pro is good for MP3 Portables but does not stand up to quality as maybe a MP3 320Kbps or VBR mp3 file does.