Well, I didn't say not to try another IDE burner, but I don't have experience with dvd duplicators, and don't know their limitations. I doubt you'll have problems mixing and matching makes of burners, but I don't know that for certain. Which makes it slightly irresponsible for me to advise you to try other makes and models without some expressed caveats.
If you have access to any other IDE interface drives, I'd give one of them a try in the tower and see if you have any issues. Hands on experimentation will tell you more than I can.