How do I extract a CLEAN version of this image ?

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this stock photo. (www.bobtaylorproductions.com/psinfo)
using photshop (and i'm nubie here) how extract clean (and mean clear edges) copy of this.
i'm taking swish , trying make white background transparent, keep getting fuzzy edge artifacts around cd's .
how make them sharp in photoshop first or how create nice clean transparent background edges of cd's sharp?
please sensitive fact i'm learning photoshop

bob, tool using make selection? smaller of 2 cds, looks need go select>modify>contract, enter in necessary number of pixels make selection smaller (to rid of white outer circle around cd). also, sure haven't specified amount of feathering selection. should keep selection edges nice , crisp.


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