Who cares how much they weigh?

The enclosure isn't exactly huge, and since the panels are somewhat small you wouldn't need a lot of internal bracing. A few dowels should get the job done. The weight is a plus as far as I see it.
Have you seen the
Klippel of the KEF Reference woofers? Quite good. I'd rather own a SS Illuminator, but not bad nonetheless!
Anyway, 6.5k is far too costly for the 201/2, IMO. It is too SPL limited (down low) for that price... One 6.5" LF driver and low sensitivity to boot? Jeff B's
Continuum has a very tight tolerance and it's more sensitive than the 201/2. I'm not saying the continuum is a better loudspeaker than the 201/2, but it's a pretty neutral speaker with similar max SPL for $5,000 cheaper..