No kids and sports cars are a bad combination. My neighbor bought his son a Mustang GT for his first car he didn't even last a year before he killed himself in it and now he and his wife are getting a divorce its a sad thing to witness.
I would go with the Buick because the Isuzu isn't even being sold here anymore that's all Isuzu's ( They pulled out of the American Market) So parts could be a issue.
Allot of people are mad about the bailout since Ford didn't take it people that still want to buy American will just buy Ford and no longer consider GM or Chrysler. That and looking at what Ford is offering in cars and comparing that to what GM or Chrysler is its really no contest Ford wins.
This coming from a man that smokes talk about being a hypocrite. And what happens when someone decides you don't have good behavior? Be careful what you wish for.