I have had pretty results from Memory Validator from Software Verify. (
http://www.softwareverify.com/cpp/memory/index.htm l ) It'll slow down your app but I think it does a better job keeping things close to real time then purify.

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Fight Entropy!!! Fight Entropy!!! Figth Etnropy! !
iFgth Etnrop!y ! giFth tErno!py ! giFt htrEno!p y! --- Well maybe
not...

No, actually, iTunes is capable of renaming the files in the file system if you let it keep its file folders organized. It also correctly files them into directories named according to the ID3 tags. I've done it many times and it works exactly as you'd want it to.

--bdj