IMO - The analog outs from the SBT are good enough for most streaming radio stations. There may be a couple of stations, like Linn Radio, that may warrant a dedicated DAC but not to go overboard if streaming is all you'll be doing.
My upgrade to a dedicated DAC really changed the entire listening experience when playing hi-rez audio files. This is true even though I'm using the wall-wart. I was lucky enough to have a spare dedicated circuit that was convenient to plug the SBT's wall-wart into. The outlet is also a PS Audio Soloist, so this setup may be helping the power supply situation without having to go linear or battery.
My upgrade to a dedicated DAC really changed the entire listening experience when playing hi-rez audio files. This is true even though I'm using the wall-wart. I was lucky enough to have a spare dedicated circuit that was convenient to plug the SBT's wall-wart into. The outlet is also a PS Audio Soloist, so this setup may be helping the power supply situation without having to go linear or battery.