The balanced/unbalanced argument has been beaten to death in the forums. Search around a bit. 8-)

NFA seems able to make his humming 7500 stop humming when he uses balanced connections....

Yes, the Maggies like a lot of power. They're somewhat inefficient. For what it's worth, I'm soon going to be driving mine (just the front pair of Maggies) with a Lyngdorf SDA2175. That will give the Maggies about 375wpc and I'll continue to use the Outlaw 755 for all the other speakers.

Cheers,