Well, I did it. I bought my Mirage and actually drove it home. My Fiat is at the dealership waiting for me to pick it up, but to do that I am going to have to rent a car.
I bought the 2017 SE. It also has fog lights. It was only about $1500 more than the ES, and I think that all the features plus the fog lights do indeed make it worth $1500 more. I am at peace with my decision.
My experience at the dealership was really weird. There were no high-pressure sales tactics applied. In fact, there were practically no sales tactics used. The salesman didn't even try harder to sell me on the SE when I mentioned I was also interested in the ES. It was like "Whatever you want ... ." However, I didn't get them to come down much on the cars.com price. They came down a little, but not much. But the cars.com price was already lower than prices at other dealerships in the region so I kinda felt that I wouldn't get them to come down much.
I enjoyed my trip home. It's got more power than I expected. It felt good and more familiar than either my Fiat or the Toyota Yaris that the Fiat replaced. There are some things I don't like, but on the whole I love this car. It's pretty much exactly what I thought it would be.
Thanks again everyone for your advice. I appreciate it all even the advice I didn't take. You all are a big help!