@ Pgovotsos
I can confirm that the scsi2sd board at least version I have (red board) from few years ago is quite slow in my CS-MKII controller which powered my original SCSI drivesd at lightning fast speed only gives me 1.22 MB/s with the my scs2sd board. For less heat/noise/space in your big box Amiga I would recommend the scs2sd as its been reliable for me but don't get one if speed is main concern for you.