I use Audiocatalyst and have no problems with it at all.
I have to admit that I'm probably not what you'd call a true audiophile... I bought my empeg based more on the sheer geek impulse to have something running Linux in my dash
But I have to say that I personally can't hear much difference between what Audiocatalyst produces and the original CDs (I use VBR at 'normal' quality for most things, although I would drop the quality a bit for 'speaking' CDs) Audiocatalyst has the added attraction of interfacing with the CDDB database, which saves me a lot of typing
Add to that the fact that Hugo and the Empeg guys recommend Audiocatalyst... that's good enough for me
Geoff
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Reg No. 554, s/n 00064 - It's mine I tell you.... all mine :)