I'm thinking on the idea of ditching the harts and going with a
Garmin.

I'm think of going with something like this...

I don't really feel like spending huge dollars and this would be about
my limit, I Don't know anything about them, does this seem like a good
model? and are the charts automatically renewable, or do you have to
buy an update?

BTW, This 2owuld be used for running on the Ohio, Tennessee, and
Cumberland rivers, including lake Barclay and Ky. Lakes.

http://www.ebay.com/itm/200-Rebate-G...item231b9453ab

Thanks!