Kuan, you are a lucky man. All of the vehicles you mentioned are great. I like the interior styling of the Aero, I like the exterior of the Volvo, the Subaru has been given great reviews for being the perfect all around vehicle. I've seen some very old Subarus and Saabs here and in Boston, the Saabs don't seem to hold up as well.

All of the vehicles you mentioned are manufactured by some of the more socially-minded manufacturers. You seem to be a liberal minded, forward-thinking person. Subaru seems to be the most progressive company in terms of social issues. Go with Subaru.