Don’t buy a Mustang for any future wife.
Do consider a Subie.
During an extrication seminar I was conducting, several members of an area fire department approached me with a question and a challenge. They had encountered a Subaru Forester involved in a crash and were unable to cut through the B-pillar with any of their extrication tools. Their cutter and their reciprocating saw were both unable to sever the pillar. They actually went back to the junkyard the next day and used a gasoline-powered rotary saw with an abrasive blade to totally remove the B-pillar. They brought it to the seminar to show me.
When I saw the pillar, it was clear that something was different about the Forester B-pillar construction. It was eight layers thick! One of the layers was a round steel rod that resembled a concrete reinforcement bar (rebar). That B-pillar had more layers of steel than I had ever seen in a vehicle.
I do realize that it’s not a totally fair comparison. Who knows if the Subaru’s roof could have withstood the same thing…but it does seem clear that the Subaru has superior reinforcement regardless. So why not? That and…I wouldn’t want a car with a live axle anyway. I should note that the Mustang had a wannabe rollbar in it, too, that totally failed to do anything.
Now here’s an interesting site: http://www.boronextrication.com/2009/10/2010-ford-fusion-side-impact-protection.html
It’s basically a blog for firefighters showing where to cut up cars during an emergency.