Thanks for link. The reviews look promising on the visibility issue, but it's interesting that the article mentions that the 800 may possibly use the same display as the Dakota, which has been widely reported to be bad when cycling in sunlight.
For me, one of the main advantages to the Edge over my other Garmins (a 60Csx and a newer Vista) is the ability to display % grade, one of the measurements necessary to gauge pain & suffering on the bike. Garmin has curiously not included this field in non-Edge units (as least the ones I have, i don't know if those fields are available on the Dakota or Colorado). I typically use the 60CSx when I'm mountain biking as my RAM mount setup is much sturdier than the Edge's mounting setup (which has apparently been improved in the Edge 800).
Being the map junkie that I am, I'd love to have a few more map options available when I'm on long distance journeys on my recumbent.