Sorry to say it, but the pushrod Taurus engine is a poor purchase. Not only does the DOHC engine perform better, but due to the better technology, it actually gets better fuel economy - despite having 45 more horsepower. The best part is pricing - Blue Book says the DOHC engine is worth just $465 more, a $465 you'll easily make up in two or three years because of the fuel economy gains.
Otherwise, it's a good car.