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62fag here. Get the s model, base model lacks extendability and barometer / compass; higher models have a topo map already installed and / or a useless camera.
Display is tiny but well readable even in bright sunlight. Routing works best for max 20 miles when using the hardware device, no limits when using pc software (besides very derpy experimental routing).
A modern phone would outperform it in terms of CPU power, but will only be useful with power tank.
64 should be a step up, so wondering as well about pricing.