There is nothing as powerful as a computer as an audio streamer. However, a computer is not a good audio device since it is electrically noisy. My solution to this is to use the Sonare mircoRendu or SonicOrbiter (I have 2 rooms with speakers). Put your computer in another room. Hook up the Sonare to your Ethernet either by a direct connection or a Powerline adapter (uses copper wiring in your house for Ethernet).
You need a DAC for this solution but I would recommend that you sell your passive LS50 (I also own these) and buy the new ACTIVE LS50 with built in DAC. Hook it up to the Sonare. Done.
"The LS50 Wireless includes an end-to-end 192kHz/24-bit high-resolution digital signal path with two dedicated digital-to-analog converters per channel, for a total of four. Each speaker features a bi-amp dual-mono configuration (200 + 30 watts per speaker) and streaming preamp, so no wires are required to connect the two. A time-correcting DSP crossover makes sure that everything stays in sync."
You need a DAC for this solution but I would recommend that you sell your passive LS50 (I also own these) and buy the new ACTIVE LS50 with built in DAC. Hook it up to the Sonare. Done.
"The LS50 Wireless includes an end-to-end 192kHz/24-bit high-resolution digital signal path with two dedicated digital-to-analog converters per channel, for a total of four. Each speaker features a bi-amp dual-mono configuration (200 + 30 watts per speaker) and streaming preamp, so no wires are required to connect the two. A time-correcting DSP crossover makes sure that everything stays in sync."