Originally Posted by
teterider
I found out it can also take .gpx files that the 305 can't and sounds like it will do what I'm thinking of.
It will crash loading the .gpx files in its current state (see post above about tracks).
Originally Posted by
teterider
Even without however, being able to see the course on a detailed map would still be much better than the generic black line on the 305.
If that is acceptable to you, then it will be a good fit. The jury is still out for me as I'm waiting for the next firmware release to see where they go with things.