Personally I like drivers like the 18Sound 18W2000, typically low Qes (0.2 - 0.3), low to medium medium Vas (say below 250 liter), medium Xmax (you don't need a lot) and preferably a low Le. These kind of drivers tend to have an n0 (Eta zero) around 3% or higher and an EBP above 100.
The Ciare 15 ndh driver will work but it's more of a bass/ sub driver, due to it's motor topology (30 mm winding depth) it's designed to have optimal cooling at large excursions. Typical excursion in Cubo Kick is 3 - 5 mm. At low to medium power levels it will be OK (500 - 700 W), well away from clipping, at high power levels (> 700 W) it might burn the ends of the voice coil, as they will never get close enough to the magnetic gap to properly cool (due to a lack of excursion). It's a perfect high power driver for Cubo 15 Extended though.