Chale I thank you for your question, as I am also looking for a Touring bicycle GPS, that is easy to read, and I can import routes and not loose everything if I take a wrong turn, as has happened to my Edge 705 and 800! I also looked at the 1000, but I am waiting for the next model to see if they improve it a LOT for touring!
https://www.amazon.com/dp/B00KT7DOU...de_a_smtd&showDetailTechData=1#technical-data
https://www.amazon.com/gp/product/B00LMJW5FQ?tag=ttr_bike_gps-20&ascsubtag=[site|ttr[cat|823[art|NA[pid|59498[tid|NA[bbc|NA&th=1
315 with heart rate and cadence+ speed sensor suitable for a Silvio with a 100 mm chainstay extension $110, 315 wth no sensors $95
505 with heart rate and cadence+ speed sensor suitable for a Silvio with a 100 mm chainstay extension $170, 315 wth no sensors $110,
The 505 is the same as 315+ bluetooth + WiFi+ Indoor trainer control.
The cadence+ speed sensor looks identical to my Wahoo Fitness Ant+ sensor!
https://forums.garmin.com/archive/index.php/t-90554.html
Chale, I have looked at reviews, and the Magellan 505, because it has Bluetooth for phone support, instead of the 315, is rated as better than the Garmin Edge 1000, as it has the same 3" screen, with a 400*240 colour resolution.
From the review above when the Edge 1000 first came out in April 2014, there were a LOT of screen freeze up problems that Garim took 3 months to fix, so users had to buy something else !
I think that the mapping on an edge 705 and 800 are both very poor, as if you go off a course, you loose all data after that, and it will only direct you to the end point, NOT to get you back on the planned bike route!!! The 315 and 505 do direct you back to the course, and have better turn indication, distance to the turn, and beep warnings!
Also as the maps are Raster images, but with turn by turn, and with a Garmin 2.2" and 2.6" screen at 240*160 resolution, it is EXTREMELY hard to find and read the name of the two roads of the intersection you are at! The 3" screen at 400*240 resolution will make that a lot easier!
The Magellan web site is very poor and hard to navigate, but once set up is OK!
The 315 and
505 ONLY comes with the map of the country it is purchased in and other country maps can not be installed! (Garmin charges an extra $180 for Topo map, and it is LOCKED to that Garmin, so if it fails within 1 year(due to riding the Three Peaks race in very wet cold conditions), and you need to buy a new one, the maps can not be transferred to the new Garmin Edge, even by Garmin, so you just wasted $360!!!)
This is a killer for me, as if cycling next year in USA and Canada, I would need to buy two 505s, but I suppose $160 each is still cheaper than Garmin's $180 per map!!!!!!