Dave,

I assume you are mounting it under the rear shelf? Are you going to port it to the passenger compartment? Please let me know how it sounds.
I have been considering replacing my Rockford Fosgate front speakers with MB Quart 3 way componets (6.5"'s look like they will fit very nicely in the front door panels at the lower rear - 4" mids in the front speaker locale - tweets TBD for best staging). Are you running componets?
Am debating eliminating the rear speakers and use the rear shelf holes for porting to the sub. Or, to port the sub via elimination of the medical box in the center of the shelf.
Am very interested in your comments/experience. Thanks