I bi-amp my center channel, and have had only 1 problem.
My amp, and my receiver combined, are not strong enough to push the speaker to it's max rms (1200watts rms goes to a 2400watt rms speaker). But then again, it can push it to the point of rattling everything in the apartment, and piss off the neighbor's as their pictures fall off the walls.
To properly balance out my center channel with the other 6 speakers, I had to buy a 100watt L-pad.
But...with that being said...Since you are just running in Stereo mode, and the speakers you have are less then 200w rms, Anamorphic96 is right, there is no need to bi-amp them, the outlaws are more then enough.
Enjoy the nice sound.
Reorx