Woa! Using Maggie 1.6 for surround?! You're either in a huge room, or going for total overkill surround! I can only dream of what the Maggie 3's sound like with the Cal 500wpc! I'm only scraping along with biamping 1.6's at 2x200wpc ;-) I'm using twin Vandersteen 2W subs to complement the weak low end of the 1.6's.
I know exactly what you mean about huge soundstage. It's as sweet as it gets!
I'd love to see pics of your set up!
Keep on enjoying the Immensity of it all!