The latest and greatest

LOL. It is just fashion. Few companies survive on the merit of their designs. Most are forced to come up with something new every 3 years.

The measure of truly high performance equipment is that it DOES NOT change much over decades and people still buy it! (yup - sounds crazy but it is true - musicians still buy Gibson Les Paul largely unchanged for 50 years!)

PMC, ATC and Harbeth stick to their high performance designs for decades.

Meanwhile B&W and most others have more designs than Imelda Marcus has shoes...that is because they sell fashionable items and always need new models to drive sales.

Whoops, forgive the spelling.

That was my concern. Prior speakers, Merlin VSM (just revisions over years), and just got Vivid 1.5, a 10 year old design. 
I will look for a tried and true for the second set.

Few companies survive on the merit of their designs

Well, Vandersteen is one of the exceptions.
The Model 2 is still in production. Had I not heard it in the '80's, I wouldn't have bought my Treo's.
B

have not hear them but they are overwhelmingly well received for SQ

people may be tired of having big gold eyes staring at them, may be anticipating the rumored upgrades, may be dying for lack of bass, or may be moving up to Kii 3's