Best Aus 1:25K map for GPS

Hi,
I'm after some opinions.
I'm looking at buying a GPS (most likely the new Garmin Oregon 600) I was looking at buying the 600T but its only loaded with 1:100K maps.
I see there are a number of choices for aftermarket 1:25k which would be far better.
Any opinions would be greatly appreciated.
Cheers,
EB
I'm after some opinions.
I'm looking at buying a GPS (most likely the new Garmin Oregon 600) I was looking at buying the 600T but its only loaded with 1:100K maps.
I see there are a number of choices for aftermarket 1:25k which would be far better.
Any opinions would be greatly appreciated.
Cheers,
EB