Basically, all new IDE DVD drives that I know of are DMA/ATA compatible. However, ATA33 seems to be about as high as they go and really, I would not bet on it being a compatible ATA33 (meaning try to hook another ATA33 device to it and it may not work).
Having both a CD and a DVD drive would be overkill, get a nice DVD drive (16X recommended) and you will be fine.
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