I want to output SPDIF data to my Cambridge Audio Dacmagic feeding a Schiit Audio Magni into HD 600's. I just discovered that my onboard USB is 16 bit 48k max. The DAC will accept 24bit 96k through SPDIF or 24bit 48k through USB. Any suggestions? I don't need Dolby, an expensive built in headphone amp or fancy DAC's. I just want to output up to 192k 24 bit data for future proofing.