Cycling GPSes with street maps include Garmin models Edge 705 and up. Sometime I see big discounts on the Garmin Edge 800 models, which are a generation behind but still have plenty of capabilities. The current Garmin models with street map capabilities are the 810 and 1000.

The Garmin Edge 500 model has a lot of features, but no street maps. You can load it with road courses you can follow, but with a comprehensive street map of an area.

To get street maps in a Garmin cycling GPS, you'll pay over $200 (on a great sale) to get a new but older model like the 800. Secondhand models are obviously cheaper.

Starting with a smartphone is a logical option. Many cycling apps will track your mileage and give you street maps. If you already have the smartphone, use one of many free apps such as CycleMeter for iPhone. RideWithGPS, MapMyRide and Strava are among the other options. With a smartphone, you'd just need a good case and mount to put the smartphone in front where you can see the maps when you want.

The cycling GPS devices are marketed towards riders interested in performance metrics like heart rate, cadence, power, and in tools such as interval workouts.