Donald Satz wrote concerning recordings of Bach's organ works:

>Koopman and Preston give very different types of interpretations.  I
>suggest getting both sets and adding Herrick/Hyperion and Bowyer/Nimbus
>as well, if possible.  If it's going to be just one of them, I recommend
>Preston.

Thanks for your recommendation!

>Just one question.  Isn't Koopman's traversal already available as part
>of Teldec's big Bach anniversary package (about 150 cd's)?

Yes indeed.  I checked Teldec's web site and Koopman's set is volume 8 of
the Bach 2000 package.

Regards,
Michael Lee