Both the newer SiRF chipset and better antennas are needed for reliable navigation under a canopy. My Oregon 600 has the newer chipset and in the open where antenna sensitivity is not big deal, it gets a position within 20’ faster than my older GPSMAP 60CSx. The 60CSx does have a better (quad helix) antenna and under a canopy that might prove advantageous and might give it an advantage over the Oregon, not sure.

I’m considering a Garmin GPSMAP 64x, which has both a newer chipset and the quad helix antenna, — the best of both processor and antenna combo’s. It also receives from GPS, GLONASS and Galileo satellite systems. That said, I’ve really come to like the display and user interface on the Oregon over the older UI of the 60/62/64/66 family. Decisions decisions...