i plan to buy the Z-5500 5.1 speakers from logitech. I hear it has great sound quality and is a good set. The only Con i know about is that the Sub Woofer is not magnetically shielded so i have to keep it away from my monitor and PC. My question is pretty much how far does the distance between the Sub and monitor + PC have to be???? or is there a way to shield it correctly without having to spend alot or go out of my way.?????