I noticed you said in your original post that this will be a daily commute car and that you seem to have some potential weather issues as well. The first thing I did was upgrade the fog lights on my BRZ because I noticed when I took it up in the mountains at night or in the morning on my drive over the hill, the stock fog lights were pretty much useless. Just my opinion.
As far as lowering it, be careful, as I have noticed the car is pretty low to begin with and I am notorious for scraping on driveways, and parking curbs. I have had to be careful with this car at stock level.
Hope it helps. I will keep reading, as I am looking to do some of the same to my car.
