>> I'm a fan of santoprene and butyl suspensions for their longevity
In home the foam doesn't crumble over time like it does in the car.
The NHT 1259 and Peerless XLS 12 doesn't have near displacement as the Adire Audio SHIVA. This is because the rubber surround limits the Xmax of both the NHT and Peerless woofers.
Blueprint drivers have high displacement. The disadvantage of Blueprint drivers is that it uses aluminum cast frame. This means aluminum cast frame doesn't have the strength to retain its structure when using at high power (+500 watts).