Well, not all inexpensive adapters support DMA, so that's something to keep in mind if you plan on using it with a DMA SCSI controller (and something like an Acard). Personally, I pay a little more and buy from Mesa or Addonics, I've seen some nasty construction on the cheap ones (like sloppy solder bridging pins). But in 98.7% of cases the cheap one will probably be fine. :p
