I finally have time to get around to this project. 2008 CX-7 with the Bose system in it and it needs an upgrade. I want to use the existing speaker locations but replace the drivers (factory has 3.5" in the dash and 9" in each front door).

H/U will likely be a Pioneer AVIC-D3 or 920 nav deck.
I'll buy amps to match the speakers.

I need to have the sub out of the way or at least the box easily removable as I have bicycles/snowboards in there sometimes. I want to keep the spare tire where it sits as well but might be able to use that space for an enclosure with the tire still in there.

Looking to do this on a reasonable budget and I'm more SQ biased than SPL.

Ideas?