I suggest not worrying about the onboard SCSI controller chip and getting an accellerator like a WarpEngine or other that has SCSI-II included. It will be faster with the new CPU and have faster memory access to the RAM on the accellerator card. I have two A3000's with WarpEngine 3040's installed that were a great step forward from the stock 25mHz 030's, so it would be even more noticable on his 16mHz machine.
:-)