Zumo 595 or Navigator VI

[TomL]

I still prefer the display on the Zumo 500.

The 590 squeezes much more onto the display but the print size is smaller and not conducive to reading when riding a motorcycle.

[Andym535]

As for the eyesight, I am asuming you are long-sighted 

Shortsighted + Contact lenses + Old age = need for reading glasses sometimes.

[sudolea]

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I found the neatest place for the coiled loom to be tucked down in front of the battery with a lazy loop to the head mount to allow flexibility for the steering. Easier to get to than in the fairing too.
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I found the original loom too cumbersome to put away properly. And I didn't need all those other cables anyway. So I dismantled my Zümo 595's mount, removed the original loom, and fixed a single (power-only) cable to it. This way, the mount can be made removable (if you provide a waterproof 12V feed). So outside the holidays, you can unmount it : the GPS is useless then, as the way to and from work is known anyway. Unmounting it (a 2 minute job) gives a better reach for inserting the contact key, and the original BMW logo isn't bad either

For those interested in making such a leaner Zümo 595 (removable) mount, I made a small video of it some time ago, including the parts list for doing that same job himself : https://www.youtube.com/watch?v=q2qydiYTEsI