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Rolloff,
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I would echo Nsgarch's post. I also have the Granite break-in CD, but was not aware of the differences between the Granite and the Purist Audio CD's until Neil's post.
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I would suggest owning both the Granite CD as well as the Cardas Frequency Sweep LP.
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The Cardas LP is a great tool to own for the long run and well worth the $ 25.00 - 30.00.
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The Cardas LP has been great to run in my system every 3 - 4 weeks (the frequency sweep side, not the burn in side, the burn in side is fantastic for cartridge break-in). I always notice a significant improvement in the Sonics of my system after playing through the Frequency sweep tracks. The results may vary based on your system and what cartridge you use.
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Rgds,
Larry
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