I have an UltraRendu, an OpticalRendu (with linear PSUs) and a Bricasti M5. I use the M5. I really must get around to selling the two Rendus.
For me, as a streamer, the M5 is as good as it gets. It also has AES/EBU and SPDIF, as well as USB, while the Rendus only have USB. AES/EBU sounds much better to me than USB with all of the many DACs I have used over the past few years. But even with USB, the M5 is a better unit.