For the Tech Savvy.  An Audio Converter Recommendation please?
I have a collection of ripped music that spans 60 gigs and is in a variety of different formats.
Yes I actually have the the vast majority of this music still on CD as well.
What  I am looking for is software that will read a folder and convert the  different file types to .mp3s or whatever single most recognizable  format is that can be played on both Apple or Windows without  modification.  
I don't mind having to pay for it.
It  needs to me something that I can give a top Folder to with wildcards  that will move down the folder trees and duplicate everything it comes  across into one format.
A suggestion of what that format should be would be appreciated.
I have files stored as wav, mp3, wma,...  heck... I don't know all of them
12000+ files in 2600 folders