The rest is me trying to figure out what exactly might be involved, and I think I'm being told... erm, just plug in some subs.
Cool, I get to quote myself

The recommended subs would not (be) chosen from a hat. They would be specific and have a specific acoustic response.
Unless something has changed, you already have all the outboard DSP required for LP response.
Looks quite nice (if you like small refrigerator sized standmount speakers) but I like this one http://www.diysoundgroup.com/waveguide-speaker-kits/fusion-series-kits/fusion12-kit.html better.
You either entirely missed my post, or misread it, since what I actually said is,
you would do anything but "just plug in some subs", as you wrote.
Please note, regarding the "main" thread topic, I also recommended a very specific kit. Just in case you missed it.

And of course, you do have my e-mail. At any time, please feel free to correspond.
CapFest is just around the corner too, so you can see/hear, firsthand, if I know how to get good bass in rooms.
Hi Andy, hope all is well. Just returned form TX myself (LSAF).
cheers,
AJ