I really like the twin twelve format.
I prefer head and cabs over combos.
I was once seriously considering the GK MB210 combo with the option for the 210MBE extension cab (now discontinued) as I always thought my ultimate rig would include 4 10's. But I have since learned the "2x12" would be a much more sensible approach for my purpose.
I'm with @twinjet in that I do prefer separate heads and cabs in order to keep everything modular and flexible.
My future (hopefully not too distant) rig: GK MB500/MB200 + GK Neo 112-II (x2, vertically stacked)
That said, there is nothing too shabby about the MB212-II combo. Congrats on your nice acquisition, @shawshank72 !