I was looking at those. The company discussed sending me some a year back, I hoped to do a little field test on them, thus, pass on a bit more info for us here. Never heard back from them so I moved on... They look pretty cool.
My active monitors are very quiet. What does your system sound like with headphones? Can you hear the same sound in the headphones? If so, the noise is coming from your system, if the noise is gone with the HP on, then your monitors are noisy.
Either way, your monitoring should be dead quiet in a pro world.