I'd like to build a media centre for my audiophile lossless music playback. However, the digital output in most motherboards isn't of sufficient quality, i.e., the jitter is quite high. I am therefore looking for a device, either a PCI card or an external box that would give me a digital output with low jitter in the range of 20ps. One obvious candidate is the Lynx two but it has DACs on it which I don't need given that I would like to use my Bryston BDA-1 for D to A conversion. I was wondering whether anyone of you learned people are aware of a device that can output digital signal with as little jitter as possible, without the added extra of a DAC or amplification.