Get the SP3. I forgot to mention it has balanced digital inputs that will give you a 6db gain in sound as well as a great sounding USB input although mine is limited to 44/1/16 PCM. And while it has a stereo analog pre-amp which rivals stand alone stereo pre-amps, once you hear the SP3 playing 7.1 Dolby Pro Logic iix Music, you'll forget about stereo for the most part.