Hello, MSW26 (strange name!)
Whether you live in the city or the suburbs or wherever isn't a deciding factor as to whether or not a good power conditioner will make a difference. I live in the suburbs and the impact of power conditioning is tremendous for both audio and video. I don't go for subtle tweaks because it's easy to spend a lot of money and never be certain you REALLY heard a difference. If I install an "improvement", listen to it for a few hours or longer, and don't seriously miss it upon removal, I don't bother with it. A decent power conditioners can easily pass that test. The only way to find out whether your setup will benefit is to try it.