HI Fred,
Looks like a good idea. I personally (for home listening) like better extension than 40 Hz...at least 30 Hz. My Khorns are barely sufficient for me (My guess is they go down to about 40 Hz). For 30 Hz, you would need a really large box for this one. It looks like a good driver for pro apps, obviously. I would question it;s performance for home use, at 40 hz up. Too much SPL and too little extension for home use, IMHO. But if you are less bass sensitive than me then it'll probably sound pretty clean.
Let us know how it pans out.
-akhilesh