Burnie: Thanks for the clarification about the 2620.
Burt: I agree, the 276 (and the 296, and 396 for that matter) are outstanding GPSRs, but the huge handicap they have for automotive navigation is that they use the proprietary Garmin memory chip for cartographic storage, and that chip is a) expensive, and b) limited in size.
The 276 is primarily a marine unit, with secondary support for automotive use, and the 296 and 396 are primarily aviation units, with full support for marine use and secondary support for automotive use.
Garmin stayed with the proprietary chip size in the 276, 296 and 396 because many mariners own charts that are stored on the small chips - for years, Garmin sold marine charts pre-loaded onto 8 meg chips. But, as the automotive maps continue to grow in size, touring riders will find themselves seriously constrained by the limited storage capacity of these models.
Although I really like the user interface of the 296 - it is one of my favorite GPSRs, and certainly the most 'tech-oriented' of all the Garmin handhelds - I cannot in good conscience recommend it to someone who intends to use it primarily for automotive use, simply because of the ever-growing size of the automotive cartography. I'm already using V8 cartography (testing it), and trust me, it ain't smaller than V7.
Michael