I still think Subaru is best bet. The only hiccup with subies is the gearboxes, otherwise normally really good.
Mitsubishi is only so so quality. GM = Shite quality to the nth degree. Since you want to seat 4 I would probably pass on the Skyline, the back seats are normally a bit cramped, and the newer models use the same engine as the Primera which is a bit lame.
Mazda is bringing out a really really nice 4wd souped up Mazda6. It should be good, Jeremy Clarkson loved the Mazda6 so this should only be better.
Toyota Celicas are good cars as well, but I am not sure how much room they have in the back. You could also go for a Mazda RX8