A couple of weekends ago, I gathered with several friends from high school for a weekend of kayaking on the Hiwassee River like we did last year before we all turned 40.  While riding back with my friend Jim Bob (who’s my most car-knowledgeable friend…I tell people he’s “pooped while reading Car & Driver since puberty,” which is the absolute truth), we discussed the fact that our family vehicle is 10 years old, has no a/c, and was recently rear-ended on Roswell Road.  I said maybe I should…