I just bought a KLH R-5100 digital surround sound receiver. It works great except when I use my optical digital audio input (which leads to a ps2) I get severe interference. Its not a humming noise ...

Once again, I'm cruisin' through the Best Buy ads and I came across a KLH receiver with 5 satellites and a sub for $200... I know nothing about KLH, but I couldn't think of anywhere better to ask.