My old acoustat 2+2 speakers sounded just as good from behind, if you have the room for these. Otherwise, check Pittsburgh Craigslist. There are a pair 1978 JVC sound in the round speakers that sound the same from any position...
omnidirectional sound
I listen to music non stop, at my house. My system is set up in the living room, but the house is fairly open, with minimum walls. When I walk to the kitchen or around the house, the sound/volume/quality changes drastically. What speakers would you be able to play music in an omnidirectional pattern, if such a thing exist? Just thinking...Hope this make sense!