I get my maps here but it sounds like you already have those and more.

I use a Vista HcX and I'm very happy with it. It acquires and locks very well even indoors and under clouds/trees. Battery life is excellent. Initially it did not record movement at < 2MPH but a software upgrade fixed that. Now it's the cat's meow and a quantum leap from my old Magellan 315.
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If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.