I've never heard the Melco but I did purchase an opticalRendu just to compare it against my EtherRegen (Fiber input on A, 1.5m CAT8 on B) into my Bricasti M5.
I use the SPDIF output on the M5 to my DAC and prefer the sound quality of that interface over the USB output of the M5 and the opticalRendu (relative to my DAC only though...). I thought the opticalRendu was competitive with the USB output of the M5, but in the end sold it since for me it didn't match what I already had with SPDIF.
Value wise the opticalRendu seemed very good based on my results being the EtherRegen/M5 combo is significantly more. Is the USB input on your DAC your favorite or at least competitive with the DAC's other inputs, and do your want to pay for the convenience of being able to choose the best one?
A relatively cheap way to add fiber and then an Ethernet streamer that supports multiple interfaces is to add a Startech MCM1110MMLC; I've actually sold my EtherRegen and switched to this along with a relatively cheap power supply for it and if I could hear the difference in my system between this and the EtherRegen it was small and I've been very happy with this feeding my M5.
I use the SPDIF output on the M5 to my DAC and prefer the sound quality of that interface over the USB output of the M5 and the opticalRendu (relative to my DAC only though...). I thought the opticalRendu was competitive with the USB output of the M5, but in the end sold it since for me it didn't match what I already had with SPDIF.
Value wise the opticalRendu seemed very good based on my results being the EtherRegen/M5 combo is significantly more. Is the USB input on your DAC your favorite or at least competitive with the DAC's other inputs, and do your want to pay for the convenience of being able to choose the best one?
A relatively cheap way to add fiber and then an Ethernet streamer that supports multiple interfaces is to add a Startech MCM1110MMLC; I've actually sold my EtherRegen and switched to this along with a relatively cheap power supply for it and if I could hear the difference in my system between this and the EtherRegen it was small and I've been very happy with this feeding my M5.