Awesome Mike, can't wait to see the build, that gos for the rest of you guys who've ordered them too 
Did you also order the parts for the H/U-frames to build your bass section or are you using something else to get by with , those dual 8" subs you were working on a while ago perhaps ?
-jay
Jay,
To start with I'll be using a single Von Schweikert VR-S1 sub. This is a sealed sub with a single 10" servo controlled driver.
As soon as I can I'll be building 2 of the ported dual 8" non-servo subs I was working on awhile back. I already have the drivers and amps, just need the wood and time. These will have to wait until I get all my other projects finished though.
Then, when I can afford them I will build 2 of the dual driver H frame OB subs. I'm still not sure whether I want to use the 8" or 12" drivers. I understand the 12" drivers would be the best sound but I don't know by how much or why.
Another concern is whether the 12" drivers would be overkill in a 1,144 cu ft (11'x13'x8') room.
With the 12" drivers, an H frame looks like it would put the center of the tweeter at 41". That is 2-3 inches too tall if I want the center of the tweeter at ear height. A W frame would lower the tweeter height.
I don't know what the performance differences are between H frames and W frames. Can anybody enlighten me on this?
Mike