UPDATE 2: I’ve now posted my hands on review of the Garmin GPSMAP 78s. I’ve also got a resource/review page up for the GPSMAP 78.
UPDATE – I’m now doing hands on testing of the GPSMAP 78 series, which seems to be the same platform as the forthcoming 62 series.
Garmin has announced three new color marine handhelds this morning, the GPSMAP 78, 78s and 78sc. Updating the 76 series, these units support Garmin custom maps and BirdsEye imagery. The “s” models include user profiles, a tri-axial compass and wireless exchange of data between units. The flagship 78sc includes pre-loaded cartography for the coastal US. And like the 76 series, they float!
There have been rumors of an updated 60 series, but I had doubts due to the supposed 62 series numbering. That is certainly making more sense after today’s announcement. We should know soon.
Manufacturer’s suggested retail price for the GPSMAP 78 series is $299.99, $399.99 and $499.99, with all three units expected to be available in May, 2010.
EDIT:
The Garmin product pages are showing prices $50 less more (oops!) than stated above and in the news release. Somebody goofed one place or the other. They also confirm paperless geocaching capability. Here are the links:
Okay, I’ve got to admit that I was a bigger fan of MotionBased than its successor, 
just 1 day before my big summer 2009 vacation to Minnesota last August. I had been eagerly awaiting this unit after reading the specs and preordering the unit in Late May. The many delays in shipping were frustrating but I was interested in seeing what this offering could do. After opening the package and briefly reading through the included guide , I was almost immediately disappointed with several aspects of the unit. Dim screen, a bit awkward in size and quirky behavior loading up a few PQs. I dumped it my caching bag with my Oregon 200 and Colorado 300 and took it with me to give it a good workout anyway.
is a new entry-level version of Garmin’s popular GPS fitness / sports watch. It has a simplified menu and drops the touch-bezel interface of recent models, replacing them with four large buttons. It’s available with or without a heart-rate monitor and comes in several colors – Men’s red, Women’s pink or Unisex.
The 
is probably Garmin’s most popular entry-level marine handheld. This greyscale unit floats and can accommodate up to 8MB of added maps. Its pre-loaded basemap brings marine navigation aids, including lights, buoys, sound signals and day beacons. 
Garmin rolled out several new updates yesterday for the Colorado, Dakota and Oregon series. There were a few fixes, but I want to concentrate on them adding BirdsEye control to profiles. I’m not really sure if you could do this with other map types before; regardless though, I want to point out the granular map controls now available to users of these units, allowing you to easily switch between map types.
is one of the newest members of the touchscreen Oregon family, featuring the latest improvements such as better visibility, a tri-axial compass, custom dashboards, advanced track navigation features and the ability to load 
Garmin barely met their March deadline for rolling out BirdsEye aerial imagery. It showed up late yesterday in the form of updates to their BaseCamp software and firmware updates for eligible units — the Colorado and Oregon series; there remains some question about whether both Dakota models are compatible – the Dakota 20 is for sure (more on that below).
The 
is a GPS-enabled cycling computer. It does not have the navigation functions available on some other members of the Edge series, though like certain models, it can be paired with a heart rate monitor and power meter. Here’s a bit more detail on how it compares to some…