SCSI is for more high-end sort of activities (usually found within the server and enterprise platforms), and costs more; but for the kind of usage you are asking, Serial ATA (S-ATA) should be adequate.
If you need a PCI to S-ATA adaptor then hit me up and i'll send you one in the post for the charge of postage (i noticed you live in NI and I had a room clear-out today).
