matevana:
Thanks for that. Yeah, I am probably going to need to do a W-Frame config. ultimately, because I'm probably moving to an apartment/condo in a while, and don't want to have build two diff. things. So the W-Frame's acoustic characteristic of not vibrating neighbours' teeth will be desirable.
As for wiring the woofers in mono...I don't know about that. I don't have nearly the experience most of you do, but whenever I'm told people can't localize bass, I have to disagree. I've done blind tests on myself and I'm definitely hearing something very different. That may of course be due to other reasons I am not knowledgeable enough to understand two woofers in diff. locations for example, but I definitely hear a big difference.