I have to try hard to form a concise question on here with enough balance in detail because I’m quite detail-oriented yet I’ve trouble in recalling what I have and have not posted throughout a thread that may span several combined posts, but I’ll try. I’ve included some more details in a second post to explain where I'm at and also if there’s not enough detail in the numbered points for what I'm looking for in a GPS.

I’m trying to determine if a Garmin GPS (probably either an Edge 810 or Garmin Edge Touring Navigator) is able to accomplish all of what I’m looking for, even if there are some workarounds that are not too inconvenient/time-consuming, then I’d consider making a commitment.



Here is what I’m looking for in a GPS unit, outside of course tracking speed/mileage.:



1.)Pre-planning a route (preferably about as seamlessly as one does so on a desktop or laptop with Google Maps: For example, I am able input different points with Google picking sensible routing between those points (even using right click and selecting those points), to determine what a route’s distance would be before or after I ride it, as most routes I do are fairly similar in terms of where I go and have limited turns and/or I am familiar with. This is without taking up an excessive amount of time on Google Maps (5-15 minutes depending on the route).

2.) Ledgible/Accurate and Updated Maps: I don’t know what the point of buying such an item is if the maps are not ledgible in both compatible PC programs for pre-planning and the GPS itself as well as being fairly updated. I’m already having a few experiences that sort of scares me off and leads me to look into this more, which is sort of a shame and embarrassing and a head scratcher.

3.) *********Re-routing OR a workaround for a detour*******: I’m skeptical and unsure how the re-routing capability works on Garmin products and not having much luck thus far in learning much at all about it via Google searches.
Example: An example would be on a 40-mile ride, at MILE 10, there is a possibility of a detour due to a potential draw bridge being raised, and my choice to take a detour taking me off route vs. waiting 15-30 minutes for a draw bridge to go back down and sometimes for traffic to clear vs. clogging up a lane. Miles 20-40 may include several turns, and on roads/ a route I'm not as familiar with.

Would I simply have to have a second, alternate pre-planned route for miles 20-40 (with the detour incorporated into that alternate route) in the event that the rerouting function greatly alters miles 20-40? Or another workaround/setting on the GPS? More POIs (if that's the right term) on a set of directions? It seems like either possible workaround, doesn’t exactly leave me feeling confident it would be all that convenient, but again, I’m not sure which is why I came here.