i just got altec lansing VS2221 speakers for my pc. they sound really great, but i have a few complaints about subwoofer magnetic radiation (i think it's subwoofer, cause sattelites are magnetic shielded). i placed sub under my table and it's about 60cm's from the monitor (like the manual said) and it's still making some minor distortions on my monitor, but only when i look cable tv on pc. so i think, could it be that the sub is too close to antenna cables.
and the other thing is that sub is (like i said it's under the table) and it's about 1-1.5 meters far from me; i started to feel some kind of a headache, it's not really a headache, like some dizzyness (hope i spelled this right:)) or something.