I've never owned a GPS device before. I need to enter multiple addresses, anywhere from 45 to 150 daily, and have those addresses organized to save time. I'll be in a car. I'm in the U.S., more specifically Chicago, IL and surrounding suburbs, basically Cook county. I'm a bit overwhelmed by all the options available. I'd like some recommendations please, so I don't waste money on a GPS with too little or too many features for what I need it for.