looking to trade around some vehicles soon.

[appealingrelic]

so im in need of a new vehicle because my eclipse just dont fit my family needs anymore. i want to trade down in value for a cheaper car and intend for it to have a decent setup inside. im partial to cars and gas mileage is kind of important like at least around 20 mpg. as far as stereo i want to put two 10s or 12s and have had an eye on the high qts FI Q series. it would run maybe 1500 rms total power in the car so i guess what im asking is has anyone had or know of a stereo friendly car. like ho alternator available not a car with known manufacturer electical faults preferably not a solid rear firewall or if it does one that i can cut without too much issue to isolate my subs from the trunk and what not.