Depends on how much you want to get into SCSI. Check around on
www.pricewatch.com and then check
www.resellerratings.com to see if the particular vendor is any good. Tekram has some fairly cheap SCSI 3 cards that you might find for $150 or less brand new. You might also try looking into an LSI Logic card---these are what Tekram uses, but LSI just makes their own cards. I am not sure if they have 64-bit/66MHz PCI slots---something you should be careful about as you'll probably run into something other than the 32-bit/33MHz PCI slots that are on home systems.