I did the home-brew method of oil coolers. This one although a little expensive, is a Transmission/Oil cooler from B&M. They put a really good SPAL fan and electronic thermostat. ~180 degrees and the fan lights up for nice cool oil. The good about this cooler is its smaller in size than say a 32 row making for an easier install, and with the fan the oil stays cool when you are under ~40mph. I have not seen over 195 on the gauge since installing this cooler, -10 lines, and thermostatic sandwich plate over a month ago.
I spent $400 on the entire installed setup.