We are coming to the point where we will need to replace both our vehicles. DH just needs a commuter car, but we are thinking we'd like one that could fit our whole family if needed. I suspect that DS would be able to 5 step in whatever we get (otherwise he'd be in a low back for just a bit longer) and DD2 could be in either high back (what she usually rides in) or a low back. DD1 is short adult height. DH is tall, and I am average. Any suggestions on what we should look for used?