The Garmin Touring is a dog of a GPS unit, no doubt. I've yet to read of anybodies positive experiences with one. The 520 is far superior and I think a recent OS update gives it much better on screen mapping, though I don't think it'll let you pick a point to navigate to from the on unit map. An 820 or 1000 will do that. Not sure of the Bolt.

Garmin Connect let's you import tcx files, so I think you can add courses from RideWithGPS. Not sure if you can create a new Garmin course from an imported file though, I'd have to check that, never done it. Obviously you would need WiFi and internet to access Connect, but once you create a course in Connect, it's immedialty available to a smartphone or tablet with data or internet (via the Garmin Mobile app). Then it's a simple BlueTooth download from the smartphone or tablet to the Garmin device, no USB or cable needed. I use this feature all the time, it's great.