So it's not exactly a beautifying addition to the house or one that is going to make us warmer in the winter, but adding a security system has been a significant upgrade. Although it's a great neighborhood... After hearing that a friend of ours a few blocks away had their house broken into and had to chase the intruder down the street with a vase (holy shit!), we decided a security system was a must. Motion detectors, glass break sensors, the whole deal. I'm already sleeping better at night.
Now, if I can only remember to disarm the system before letting the dog out first thing in the morning, I will stop scaring the bejeezus out of myself (and the dog!)