Is there anyone who has tried more expensive usb cables with the rdac? Higher quality usb cables reduce jitter but as the rdac is asynchronous the clocking is done by the rdac & not the computer, so I'm wondering how much affect if any, different usb cables can have. I don't have an rdac I have just bought a Musical Fidelity v-link (asynchronous usb to S/PDIF converter) and I am a bit underwhelmed compared with the optical out on the motherboard. I don't want to spend any cash on an expensive usb cable if there is not going to be much difference in the sound.