You can get the QX-5 Twenty for less by eliminating unused inputs. It won't get you to the price level of the DirectStream, but it helps.
QX-5 Base - S/PDIF + AES/EBU $6,950
QX-5 USB - USB + S/PDIF + AES/EBU $7,650
QX-5 Net - Ethernet + S/PDIF + AES/EBU $8,250
QX-5 Full - Ethernet + USB + S/PDIF + AES/EBU $8,950
Note that these prices may have changed since September 2017.
QX-5 Base - S/PDIF + AES/EBU $6,950
QX-5 USB - USB + S/PDIF + AES/EBU $7,650
QX-5 Net - Ethernet + S/PDIF + AES/EBU $8,250
QX-5 Full - Ethernet + USB + S/PDIF + AES/EBU $8,950
Note that these prices may have changed since September 2017.