If you were in love with the functionality of the Garmin Edge Touring, but don't want to ride without your heart rate monitor, the Garmin Edge Touring Plus is the ticket. It has all the features of the Edge Touring, but with heart rate monitor compatibility
You can search for a destination within the Edge Touring, without using a computer ahead of time. The microSD card is preloaded with bike-ready maps, and will route you through paths, back roads, and scenic detours if you tell it to do so. The display is a nice, large 1.4 x 2.2 inches, and it's easy to see in almost any kind of light (or lack thereof).
Please note that the Edge Touring is not compatible with powermeters.