I too am awaiting how the 520 Plus turns out - it looks like it'll have everything i want in a reasonably light GPS and i hope the screen readibility in normal sunlight with zero back-light is good. Otherwise i'll get the Bolt with it's already toted excellent monochrome screen - albeit without re-routing capability (sigh).
I have the Cyclo 505 and it's screen is very dull and at times can be difficult to discern a route (purple) from the roads (blue). But don't get me wrong - the Cyclo 505 has the best navigation on this planet. I just want something lighter with navigation too.