Thank you, gentlemen...
The BFD is on the way.

Wooch, yes, my RX-V1400 has flexible bass management settings, delay, xo, etc...should come in handy. I am ordering the BFD today finally, and I do know the significant impact it can have by itself, having heard its effects at a friend's place before.

I should explain, however, that I'm not so concerned with building these subs because I need them, or desire upgrading and improved performance...This PW-2200 is enough for me in all honesty, but rather I'm building them for the fun of it...love building speakers, working with wood, and learning about all things audio is fun, hence the hobby.

The challenging part is building two subwoofers for around the cash I'm getting for selling my PW-2200 that will outperform the incumbent subwoofer...After modeling a few designs, I don't think it's going to be that hard. One will cost $250, the other about $350 in parts...I have lots of MDF and veneer lying around...Net result should be a 2nd sub built for about $100.
The nice thing about the Tempest driver is it's reasonably efficient, not requiring a ton of power. I've conversed with a few people that are reporting excellent results with 240 and 250 watt amps. The other driver I'm getting is even better...this is allowing me to get away with some smaller amplification while saving a ton of money (though I might just buy a larger amp for now anyway)/ One thing I learned buying my last reciever, is not to get too carried away with numbers...more is not always better, especially if I won't call upon it.

My initial modeling in unibox (software) tell me that a sealed sub is still ideal for both subs in their respective rooms, though I'm not sure what to expect in the larger room as far as cabin gain below 25 Hz...We'll see...

Live and learn.

I expect you folks to be around when I hit you up for some help with bass traps and setting up the BFD.

Thanks again!