zardozmike,
I was about to post my long and detailed response to your post but thought it would be more useful as a separate thread because you could still read my info and there may be responses from other members who utilize a distributed sub array system. It's titled 'Anybody else using a distributed array sub system?' in the speaker section. I think you'll find my info useful since I use very similar speakers to yours (Magnepan 2.7QR).
Hope this helps,
Tim