As Pepe noted, I had a PS Audio Superlink but because of it's age, you couldn't run dsd or dsf files thru it. I loved the sound but the limited stream and lack of usb input made me change. I purchased a MacMini to use just for jRiver and needed something newer that could handle hi-res files. I decided to go with an Arcam rDac with a TeraDak power supply after a lot of research. I tried other DAC's that cost 4x as much and I thought the Arcam still sounded better. Used you can usually find one for around $300. There is one on fleabay right now for the same price. If you wanted to go with the upgraded power supply, I think TeraDak sells them for around $100-150.