Go with one 15" MOJO for SPL and a 10" 9500 for SQ, the 10" size will add to the quickness of the woofer. Get an amp with a separate left and right gain control so you can crank the bass knob on the 15" MOJO incase you want more SPL instead of SQ.
All sarcasm aside,
I'm glad no one said the MOJO lacks SQ ...
*EDIT* I once cracked a windshield with one 10" MOJO. Actually only part of the MOJO, since it's modular it was only the motor that flew into the windshield when I threw it. Case closed.