Fat Charlie:
Since we have a similar car, (although yours is a few years newer, and a turbo) I thought you might like to know that I've blocked my entire bottom grill out without any sign of increased heat. This includes driving around in today's 105 degree weather up and down mountains at any speed between 5 and 75 mph. The only time I've removed it in 3 years of use is when towing, as my mileage is going to be crap anyway and I'd rather not risk it. It also makes a noticeable difference in mileage with such a large bottom grill.
Also think it's funny you want larger mirrors, since I want smaller ones! They look like they belong on a truck. Want to trade?