I have the stereo-link and as you say it has no input or output for other gear. It has headphone output with volume control. I will say that it took my computer sound from bad-pretty darn good, it is a usb device and as such takes your computer soundcard out of the picture. I can not give any advice as to the Onkyo or how it hooks to your computer. I do think that the onkyo products I have had over the years gave good bang for buck. I think SGHT had something to say about the onkyo in their pc gear section a while back.