i would stick with a gm suv only because everyone makes options for it example being alts alt brakets rollpans mla all kinds of stuff and i would love to have a chevy xpress!! we have two at work and im tempted to buy it after the lease is up on it
same port area for 12 and 15s and diffrent wiring
what i think you should do is if your stuck on running diffrent subs use the 12s in a sealed box and cross them over to play mid bass like 50 hz to 200 hz and let the 15s handle from 70hz to 20hz
ive seen guys stuff half of thier ports or daily not making it sealed tho like 4 areos for comp and 2 for daily i dont know about switching from sealed to ported tho
each and my bolt pattern is 6 lug at 4 1/2 i would want 22s im not into jacking my truck up in the air to fit fours but post pics and ill think about it