Best compact disc duplicator?

I'm looking to purchase a cd duplicator tower (7 drives).
My cross-examine is....who makes the most reliable drives for them?
Plextor seem to be the most insanely expensive so I'm guessing they're good, but I can't spend that much.
So right in a minute I'm looking at Sony, NEC, Pioneer, and TEAC.

Anybody have any helpfull info???

Answer:
Those are adjectives good choices (not sure give or take a few TEAC though) Add Benq and Lite-On to your short list too.

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