Mike B.,
I wouldn't suggest changing the thermostat unless you have a reason. That's the proper operating temperature for this vehicle. I have seen on occasion where a vehicle ECU would not adjust settings properly because someone had replaced their 195 degree thermostat with a 180 degree stat. I didn't believe it either until we hooked up a computer and you could see that it wasn't making the appropriate adjustments. If your car is overheating, do it. If it isn't, I wouldn't replace it on the assumption that it would keep the entire engine cooler. Remember, you want the engine to be at proper operating temperature; not more, not less.
-Sam