I prefer the spdif as well. Having the non-uber USB, to me sounded not as clear as the optical. What I don't like is that the optical input on the Bifrost when receiving the optical end of the cable, seems to lack the proper connect (tough to describe it) as it seems the optical end just rests in the jack itself, rather than snapping in. Just comes down to personal preference. But what I have to keep reminding myself is that any upgrades makes the tiniest of incremental changes. I have ignored the elders and spent money on cables, connectors, gas infused, adamantium, un-obtanium copper this and that, and the result has not been revolutionary. I will say there is a sound difference between a 2 dollar optical cable and a 16 dollar optical cable. I did once again went with the immortal Monster optical cable the sound is the same as the 16 dollar one, but that is about it. Just my $.02.