If you're using a an Edge Touring with RWGPS then I'd suggest you use a .tcx file and turn off the turn-by-turn navigation (that's what I do anyway). The Edge Touring is lacking the horsepower to do TBT convincingly, but does brilliantly with a .tcx file.
Yup. You'll want to put the 'Course Point Distance' field on your map screen, that'll tell you a distance to the next turn as well as an icon, a brief description (accordingly to RWGPS anyway, sometimes if will confuse a change of road name for a turn) and will beep if you want it to.
If you're using a an Edge Touring with RWGPS then I'd suggest you use a .tcx file and turn off the turn-by-turn navigation (that's what I do anyway). The Edge Touring is lacking the horsepower to do TBT convincingly, but does brilliantly with a .tcx file.