Sondigo wireless audio bridge.
I had to post about this product. I needed a cheapish solution to pipe my iTunes wirelessly through to my bedroom, so the wife and I could listen to soothing sounds before sleep. I picked up a Logitech 5.1 Z-5500 system normally intended for PC gamers. http://www.logitech.com/index.cfm/speakers_audio/home_pc_speakers/device... Then I ordered a Sondigo Sirrocco wireless audio bridge. It acts as your PC's primary sound card, and can switch dynamically back and forward from your internal card. The only bummer is that you have to restart apps like iTunes after switching. It's a small gripe though. http://www.sondigo.com/ Anyway, the Sondigo will upmix the iTunes tracks to 5.1 (I link the Sondigo to the Logitech rig via optical cable) and I can select a small number of filters to tune the sound to my tastes. The only problem was having the ability to remotely control iTunes and occasionally Windows Media Player. The answer came with the help of my Wife's unused Palm Tungsten E2. I found an very useful app almost custom-made for my requirements called Salling Clicker: http://www.salling.com/Clicker/windows/ They have a Mac OSX version as well. Now I can control my remotely iTunes using bluetooth or wireless. It allows me to search by name, artist or just browse, though over bluetooth if you have a large library, this can take ages. Better to stick to playlists. A bonus is that you can display album artwork along with the tracks. It all works quite well, considering the relatively low cost. There has been the odd occasion, when playing rainforest sounds through the system, that I have awoken thinking I'm on a camping trip!