I have not had one problem with dBpoweramp and use the same procedure you are using to rip and copy files to the final hard drive I will access with my SB3.

I have wondered about the Duet and the SB3. I plan to get a second SB3 for another system and I think I will get the SB3 abd purchase the new controller separately. I just like having the display on the SB3 and it looks cool.

Ron

HT: 568.2mm (Revelation One filter), 518x2, SB3, Bryston 7BSTx3, 8BST, Aerial 10T, CC3, SW12(Qty2) w/SVS AS-EQ1, MK Tripole x4. JVC RS1u, DVDO Duo, Oppo 103 w/Vanity103HD, Sony PS3, VIP 3D Theatre, Acer H5360. Logitech Ultimate Remote and Hub.